Ronald Rosario
C Portland Sea Dogs| Year | Age | Lvl / Team | PA | AVG/OBP/SLG | HR | SB | wRC+ | WAR | MLE AVG/OBP/SLG |
|---|---|---|---|---|---|---|---|---|---|
| 2024 | 21 | A+BOS | 427 | .244/.304/.359 | 8 | 2 | 45 | — | .200/.243/.292 |
| 2025 | 22 | AABOS | 402 | .201/.280/.321 | 11 | 5 | 40 | — | .185/.244/.272 |
| 2026 | 23 | AABOS | 314 | .267/.324/.497 | 16 | 2 | 91 | — | .241/.285/.418 |
| 2027PROJMLE | 24 | MLBBOS | 4 | .218/.267/.350 | 0 | 0 | 68 | 0.0 | |
| 2028PROJ31% MLB | 25 | MLBBOS | 70 | .221/.271/.356 | 2 | 1 | 71 | 0.1 | |
| 2029PROJ45% MLB | 26 | MLBBOS | 123 | .222/.274/.358 | 3 | 1 | 73 | 0.1 |
Tools · ContractCON 35 / POW 40
Career Stats + Projections
Methodology▸ how these numbers are built
All seasons translated to park-neutral MLB-equivalent (MLE) and combined per year. 2027 = full-season projection (no games played yet). 2028+ via Advanced Marcel + aging curve. Catcher framing: only 2027 Statcast framing is modeled (Baseball Savant server-caches the leaderboard to the current season); prior-year framing is unmodeled — projections for established framers may run 1-3 WAR low.
| Year | Age | Lvl | Team | MLB% | PA | AB | H | 2B | 3B | HR | BB | SO | HBP | SB | CS | AVG | OBP | SLG | OPS | ISO | BABIP | K% | BB% | wOBA | wRC+ | BAT | RUN | FLD | POS | REP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ▸ Career — actual stats, one row per stint (as recorded, no adjustments) | |||||||||||||||||||||||||||||||
| 2021 | 18 | ROK | DSL BOS Blue | — | 20 | 16 | 8 | 1 | 0 | 1 | 4 | 1 | 0 | 0 | 0 | 500 | 600 | 750 | 1.350 | 250 | 500 | 5 | 20 | 579 | 130 | — | — | — | — | — | — |
| 2022 | 19 | ROK | FCL Red Sox | — | 51 | 41 | 10 | 2 | 0 | 0 | 7 | 11 | 3 | 0 | 0 | 244 | 392 | 293 | 685 | 49 | 333 | 22 | 14 | 331 | 36 | — | — | — | — | — | — |
| 2023 | 20 | A+ | Greenville Drive | — | 247 | 215 | 56 | 12 | 2 | 3 | 27 | 74 | 2 | 1 | 0 | 260 | 348 | 377 | 725 | 116 | 376 | 30 | 11 | 326 | 53 | — | — | — | — | — | — |
| 2023 | 20 | A | Salem Red Sox | — | 72 | 56 | 14 | 5 | 1 | 1 | 12 | 22 | 2 | 0 | 0 | 250 | 400 | 429 | 829 | 179 | 371 | 31 | 17 | 365 | 82 | — | — | — | — | — | — |
| 2024 | 21 | A+ | Greenville Drive | — | 427 | 390 | 95 | 19 | 1 | 8 | 32 | 82 | 2 | 2 | 1 | 244 | 304 | 359 | 663 | 115 | 287 | 19 | 7 | 298 | 45 | — | — | — | — | — | — |
| 2025 | 22 | AA | Portland Sea Dogs | — | 402 | 358 | 72 | 10 | 0 | 11 | 33 | 95 | 6 | 5 | 3 | 201 | 280 | 321 | 601 | 120 | 239 | 24 | 8 | 272 | 40 | — | — | — | — | — | — |
| 2026 | 23 | AA | Portland Sea Dogs | — | 314 | 288 | 77 | 16 | 1 | 16 | 22 | 69 | 2 | 2 | 1 | 267 | 324 | 497 | 820 | 229 | 299 | 22 | 7 | 357 | 91 | — | — | — | — | — | — |
| ▸ Career — adjusted (every ACTUAL line translated to park/league-neutral MLB equivalents) | |||||||||||||||||||||||||||||||
| 2021 | 18 | ROK MLE | DSL BOS Blue | — | 20 | 17 | 5 | 1 | 0 | 0 | 3 | 1 | 0 | 0 | 0 | 294 | 400 | 353 | 753 | 59 | 318 | 5 | 15 | 361 | 130 | — | — | — | — | — | — |
| 2022 | 19 | ROK MLE | FCL Red Sox | — | 51 | 44 | 7 | 1 | 0 | 0 | 4 | 16 | 3 | 0 | 0 | 159 | 275 | 182 | 456 | 23 | 257 | 31 | 8 | 222 | 36 | — | — | — | — | — | — |
| 2023 | 20 | A+ MLE | Greenville Drive | — | 247 | 226 | 46 | 9 | 1 | 3 | 16 | 99 | 2 | 1 | 0 | 204 | 262 | 292 | 554 | 88 | 331 | 40 | 6 | 247 | 53 | — | — | — | — | — | — |
| 2023 | 20 | A MLE | Salem Red Sox | — | 72 | 60 | 12 | 4 | 1 | 1 | 8 | 30 | 2 | 0 | 0 | 200 | 314 | 350 | 664 | 150 | 339 | 42 | 11 | 290 | 82 | — | — | — | — | — | — |
| 2024 | 21 | A+ MLE | Greenville Drive | — | 427 | 401 | 80 | 14 | 1 | 7 | 21 | 112 | 2 | 2 | 1 | 200 | 243 | 292 | 535 | 92 | 255 | 26 | 5 | 235 | 45 | — | — | — | — | — | — |
| 2025 | 22 | AA MLE | Portland Sea Dogs | — | 402 | 368 | 68 | 8 | 0 | 8 | 23 | 119 | 6 | 5 | 3 | 185 | 244 | 272 | 516 | 87 | 239 | 30 | 6 | 228 | 40 | — | — | — | — | — | — |
| 2026 | 23 | AA MLE | Portland Sea Dogs | — | 314 | 294 | 71 | 14 | 1 | 12 | 16 | 84 | 2 | 2 | 1 | 241 | 285 | 418 | 704 | 177 | 292 | 27 | 5 | 302 | 91 | — | — | — | — | — | — |
| 2021 | 18 | ROK MLE | DSL BOS Blue | — | 20 | 17 | 5 | 1 | 0 | 0 | 3 | 1 | 0 | 0 | 0 | 294 | 400 | 353 | 753 | 59 | 312 | 5 | 15 | 361 | 130 | — | — | — | — | — | — |
| 2021 | 18 | ROK RAW | DSL BOS Blue | — | 20 | 16 | 8 | 1 | 0 | 1 | 4 | 1 | 0 | 0 | 0 | 500 | 600 | 750 | 1.350 | 250 | 500 | 5 | 20 | 579 | 130 | — | — | — | — | — | — |
| 2022 | 19 | ROK MLE | FCL Red Sox | — | 51 | 44 | 7 | 1 | 0 | 0 | 4 | 16 | 3 | 0 | 0 | 159 | 275 | 182 | 456 | 23 | 250 | 31 | 8 | 222 | 36 | — | — | — | — | — | — |
| 2022 | 19 | ROK RAW | FCL Red Sox | — | 51 | 41 | 10 | 2 | 0 | 0 | 7 | 11 | 3 | 0 | 0 | 244 | 392 | 293 | 685 | 49 | 333 | 22 | 14 | 331 | 36 | — | — | — | — | — | — |
| 2023 | 20 | A+ MLE | 2 teams | — | 319 | 286 | 58 | 13 | 2 | 4 | 24 | 129 | 4 | 1 | 0 | 203 | 274 | 304 | 578 | 101 | 342 | 40 | 8 | 257 | 60 | — | — | — | — | — | — |
| 2023 | 20 | A+ RAW | 2 teams | — | 319 | 271 | 70 | 17 | 3 | 4 | 39 | 96 | 4 | 1 | 0 | 258 | 360 | 387 | 747 | 129 | 375 | 30 | 12 | 335 | 60 | — | — | — | — | — | — |
| 2024 | 21 | A+ MLE | Greenville Drive | — | 427 | 401 | 80 | 14 | 1 | 7 | 21 | 112 | 2 | 2 | 1 | 200 | 243 | 292 | 535 | 92 | 256 | 26 | 5 | 235 | 45 | — | — | — | — | — | — |
| 2024 | 21 | A+ RAW | Greenville Drive | — | 427 | 390 | 95 | 19 | 1 | 8 | 32 | 82 | 2 | 2 | 1 | 244 | 304 | 359 | 663 | 115 | 287 | 19 | 7 | 298 | 45 | — | — | — | — | — | — |
| 2025 | 22 | AA MLE | Portland Sea Dogs | — | 402 | 368 | 68 | 8 | 0 | 8 | 23 | 119 | 6 | 5 | 3 | 185 | 244 | 272 | 516 | 87 | 246 | 30 | 6 | 228 | 40 | — | — | — | — | — | — |
| 2025 | 22 | AA RAW | Portland Sea Dogs | — | 402 | 358 | 72 | 10 | 0 | 11 | 33 | 95 | 6 | 5 | 3 | 201 | 280 | 321 | 601 | 120 | 239 | 24 | 8 | 272 | 40 | — | — | — | — | — | — |
| 2026 | 23 | AA MLE | Portland Sea Dogs | — | 314 | 294 | 71 | 14 | 1 | 12 | 16 | 84 | 2 | 2 | 1 | 241 | 285 | 418 | 704 | 177 | 296 | 27 | 5 | 302 | 91 | — | — | — | — | — | — |
| 2026 | 23 | AA RAW | Portland Sea Dogs | — | 314 | 288 | 77 | 16 | 1 | 16 | 22 | 69 | 2 | 2 | 1 | 267 | 324 | 497 | 820 | 229 | 299 | 22 | 7 | 357 | 91 | — | — | — | — | — | — |
| 2021 | 18 | ROK MLE | DSL BOS Blue | — | 20 | 17 | 5 | 1 | 0 | 0 | 3 | 1 | 0 | 0 | 0 | 294 | 400 | 353 | 753 | 59 | 318 | 5 | 15 | 361 | 130 | — | — | — | — | — | — |
| 2022 | 19 | ROK MLE | FCL Red Sox | — | 51 | 44 | 7 | 1 | 0 | 0 | 4 | 16 | 3 | 0 | 0 | 159 | 275 | 182 | 456 | 23 | 257 | 31 | 8 | 222 | 36 | — | — | — | — | — | — |
| 2023 | 20 | A+ MLE | 2 teams | — | 319 | 288 | 58 | 13 | 2 | 4 | 24 | 129 | 4 | 1 | 0 | 201 | 274 | 302 | 576 | 101 | 333 | 40 | 8 | 257 | 60 | — | — | — | — | — | — |
| 2024 | 21 | A+ MLE | Greenville Drive | — | 427 | 401 | 80 | 14 | 1 | 7 | 21 | 112 | 2 | 2 | 1 | 200 | 243 | 292 | 535 | 92 | 255 | 26 | 5 | 235 | 45 | — | — | — | — | — | — |
| 2025 | 22 | AA MLE | Portland Sea Dogs | — | 402 | 370 | 68 | 8 | 0 | 8 | 23 | 119 | 6 | 5 | 3 | 184 | 244 | 270 | 515 | 86 | 239 | 30 | 6 | 228 | 40 | — | — | — | — | — | — |
| 2026 | 23 | AA MLE | Portland Sea Dogs | — | 314 | 293 | 71 | 14 | 1 | 12 | 16 | 84 | 2 | 2 | 1 | 242 | 285 | 420 | 705 | 177 | 292 | 27 | 5 | 302 | 91 | — | — | — | — | — | — |
| ▸ Model inputs — neutral MLE (past 3 seasons) | |||||||||||||||||||||||||||||||
| 2024 | 21 | A+ MLE | Greenville Drive | — | 427 | 401 | 80 | 14 | 1 | 7 | 21 | 112 | 2 | 2 | 1 | 200 | 243 | 292 | 535 | 92 | 255 | 26 | 5 | 235 | 45 | — | — | — | — | — | — |
| 2025 | 22 | AA MLE | Portland Sea Dogs | — | 402 | 370 | 68 | 8 | 0 | 8 | 23 | 119 | 6 | 5 | 3 | 184 | 244 | 270 | 515 | 86 | 239 | 30 | 6 | 228 | 40 | — | — | — | — | — | — |
| 2026 | 23 | AA MLE | Portland Sea Dogs | — | 314 | 293 | 71 | 14 | 1 | 12 | 16 | 84 | 2 | 2 | 1 | 242 | 285 | 420 | 705 | 177 | 292 | 27 | 5 | 302 | 91 | — | — | — | — | — | — |
| ▸ 2027 season | |||||||||||||||||||||||||||||||
| ▸ 2027 — full MLE projection (neutral park, full availability) | |||||||||||||||||||||||||||||||
| 2027 | 24 | MLB MLE | BOS | 2% | 364 | 339 | 73 | 13 | 1 | 10 | 19 | 96 | 3 | 3 | 1 | 213 | 261 | 342 | 604 | 130 | 264 | 26 | 5 | 269 | 68 | -14 | +0 | +0 | +7 | +8 | 0.2 |
| ▸ 2027 — real world (MLB) | |||||||||||||||||||||||||||||||
| 2027 | 24 | MLB CTX | BOS | 2% | 4 | 4 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 218 | 267 | 350 | 617 | 132 | 273 | 25 | 0 | 275 | 68 | -0 | +0 | +0 | +0 | +0 | 0.0 |
| ▸ Career projection (2028+) — MLB context, MLB playing time (PA × MLB%) | |||||||||||||||||||||||||||||||
| 2028 | 25 | MLB MLE | BOS | 31% | 225 | 209 | 45 | 8 | 1 | 6 | 12 | 59 | 2 | 2 | 1 | 215 | 265 | 348 | 613 | 133 | 265 | 26 | 5 | 273 | 71 | -8 | +0 | +0 | +4 | +5 | 0.1 |
| 2029 | 26 | MLB MLE | BOS | 45% | 275 | 255 | 56 | 10 | 1 | 8 | 16 | 71 | 2 | 3 | 1 | 216 | 268 | 350 | 619 | 134 | 266 | 26 | 6 | 275 | 73 | -9 | +0 | +0 | +5 | +6 | 0.2 |
| 2030 | 27 | MLB MLE | BOS | 49% | 300 | 276 | 60 | 11 | 1 | 8 | 18 | 78 | 3 | 3 | 2 | 217 | 270 | 351 | 620 | 134 | 267 | 26 | 6 | 276 | 73 | -10 | -0 | +0 | +5 | +6 | 0.2 |
| 2031 | 28 | MLB MLE | BOS | 52% | 311 | 286 | 62 | 11 | 1 | 8 | 19 | 81 | 3 | 3 | 2 | 216 | 270 | 349 | 619 | 133 | 267 | 26 | 6 | 276 | 73 | -10 | -0 | -1 | +6 | +7 | 0.1 |
| 2032 | 29 | MLB MLE | BOS | 52% | 310 | 285 | 62 | 11 | 1 | 8 | 19 | 81 | 3 | 2 | 2 | 215 | 270 | 346 | 616 | 130 | 267 | 26 | 6 | 275 | 72 | -10 | -0 | -1 | +6 | +7 | 0.0 |
| 2033 | 30 | MLB MLE | BOS | 56% | 306 | 283 | 61 | 11 | 1 | 8 | 18 | 81 | 2 | 1 | 2 | 212 | 266 | 338 | 604 | 126 | 265 | 26 | 6 | 270 | 69 | -11 | -1 | -2 | +5 | +7 | -0.2 |
| 2028 | 25 | MLB CTX | BOS | 31% | 70 | 65 | 15 | 3 | 0 | 2 | 4 | 18 | 1 | 1 | 0 | 221 | 271 | 356 | 627 | 135 | 274 | 26 | 6 | 279 | 71 | -2 | +0 | +0 | +1 | +2 | 0.1 |
| 2029 | 26 | MLB CTX | BOS | 45% | 123 | 114 | 25 | 5 | 0 | 3 | 7 | 32 | 1 | 1 | 1 | 222 | 274 | 358 | 632 | 136 | 276 | 26 | 6 | 281 | 73 | -4 | -0 | +0 | +2 | +3 | 0.1 |
| 2030 | 27 | MLB CTX | BOS | 49% | 148 | 137 | 30 | 6 | 0 | 4 | 9 | 38 | 1 | 1 | 1 | 223 | 275 | 359 | 634 | 136 | 276 | 26 | 6 | 282 | 73 | -5 | -0 | +0 | +3 | +3 | 0.1 |
| 2031 | 28 | MLB CTX | BOS | 52% | 160 | 148 | 32 | 6 | 0 | 4 | 10 | 41 | 1 | 1 | 1 | 222 | 276 | 357 | 633 | 135 | 277 | 26 | 6 | 282 | 73 | -5 | -0 | -0 | +3 | +3 | 0.1 |
| 2032 | 29 | MLB CTX | BOS | 52% | 160 | 148 | 32 | 6 | 0 | 4 | 10 | 42 | 1 | 1 | 1 | 221 | 275 | 354 | 629 | 133 | 276 | 26 | 6 | 281 | 72 | -5 | -0 | -1 | +3 | +3 | 0.0 |
| 2033 | 30 | MLB CTX | BOS | 56% | 171 | 158 | 34 | 7 | 0 | 4 | 10 | 45 | 1 | 1 | 1 | 218 | 272 | 346 | 618 | 128 | 274 | 26 | 6 | 276 | 69 | -6 | -0 | -1 | +3 | +4 | -0.1 |
| ▸ Career Totals | |||||||||||||||||||||||||||||||
| ▸ Career totals — MLB only (actual + projected) | |||||||||||||||||||||||||||||||
| Career | — | A+C | — | 832 | 770 | 168 | 33 | 0 | 21 | 50 | 216 | 6 | 6 | 5 | 218 | 271 | 343 | 614 | 125 | 273 | 26 | 6 | 280 | 65 | -28 | -1 | -2 | +15 | +18 | 0.2 | |
| / 162G | — | A+C | — | 650 | 602 | 131 | 26 | 0 | 16 | 39 | 169 | 5 | 5 | 4 | 218 | 271 | 341 | 612 | 123 | 273 | 26 | 6 | 280 | 65 | -22 | -1 | -2 | +12 | +14 | 0.2 | |
| Career | — | MLE | — | 3449 | 3179 | 672 | 120 | 10 | 82 | 203 | 962 | 34 | 26 | 16 | 211 | 266 | 333 | 599 | 121 | 273 | 28 | 6 | 264 | 65 | -65 | -1 | -4 | +34 | +42 | 0.5 | |
| / 162G | — | MLE | — | 650 | 599 | 127 | 23 | 2 | 15 | 38 | 181 | 6 | 5 | 3 | 212 | 266 | 332 | 598 | 120 | 275 | 28 | 6 | 264 | 65 | -22 | -0 | -1 | +12 | +14 | 0.2 | |
How the minor-league lines were translated
One row per minor-league stint. Open a row to see each step: the raw rate, the park adjustment, the league/level factor, the age adjustment (hitters) and the resulting MLE rate. Factors are the same ones listed on the MLE Factors page.
2026 AAPortland Sea Dogs · 314 PAwOBA .348 → .302 (−46)K% 22.0% → 26.8%
| Component | Raw | Park ÷ | Level factor × | GB/FB × | Age × | = MLE |
|---|---|---|---|---|---|---|
| K% /PA | 21.97% | ÷1.000 | ×1.220 | — | — | 26.81% |
| BB% (unintentional) /PA | 7.01% | ÷1.000 | ×0.700 | — | ×1.027 | 5.04% |
| HBP% /PA | 0.64% | — | ×0.850 | — | ×1.027 | 0.56% |
| Singles /BIP | 20.09% | ÷1.000 | ×0.970 | ×1.026 | ×1.027 | 20.54% |
| Doubles /BIP | 7.31% | ÷1.000 | ×0.860 | ×1.026 | ×1.027 | 6.62% |
| Triples /BIP | 0.46% | ÷1.000 | ×0.950 | ×1.026 | ×1.027 | 0.46% |
| Home runs /BIP | 7.31% | ÷1.000 | ×0.780 | — | ×1.027 | 5.85% |
Factors used: league row EL. Park (home-season share, regressed): no park row on file (treated as neutral) — applied at half strength. Age: age 23 vs a level average of 24.8 → +2.7% on BB/HBP/hit rates (1.8 yr younger than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×1.026.
Result: wOBA .348 → .302; ISO .229 → .185; BABIP .299 → .292. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).
2025 AAPortland Sea Dogs · 402 PAwOBA .267 → .228 (−39)K% 23.6% → 29.5%
| Component | Raw | Park ÷ | Level factor × | GB/FB × | Age × | = MLE |
|---|---|---|---|---|---|---|
| K% /PA | 23.63% | ÷0.978 | ×1.220 | — | — | 29.48% |
| BB% (unintentional) /PA | 8.21% | ÷1.055 | ×0.700 | — | ×1.042 | 5.68% |
| HBP% /PA | 1.49% | — | ×0.850 | — | ×1.042 | 1.32% |
| Singles /BIP | 19.39% | ÷0.962 | ×0.970 | ×1.002 | ×1.042 | 20.42% |
| Doubles /BIP | 3.80% | ÷1.109 | ×0.860 | ×1.002 | ×1.042 | 3.08% |
| Triples /BIP | 0.00% | ÷1.141 | ×0.950 | ×1.002 | ×1.042 | 0.00% |
| Home runs /BIP | 4.18% | ÷1.119 | ×0.780 | — | ×1.042 | 3.04% |
Factors used: league row EL. Park (home-season share, regressed): HR 124, 1B 92, 2B 122, 3B 128, K 96, BB 111 — applied at half strength. Age: age 22 vs a level average of 24.8 → +4.2% on BB/HBP/hit rates (2.8 yr younger than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×1.002.
Result: wOBA .267 → .228; ISO .120 → .087; BABIP .239 → .239. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).
2024 A+Greenville Drive · 427 PAwOBA .292 → .235 (−56)K% 19.2% → 26.2%
| Component | Raw | Park ÷ | Level factor × | GB/FB × | Age × | = MLE |
|---|---|---|---|---|---|---|
| K% /PA | 19.20% | ÷0.960 | ×1.310 | — | — | 26.21% |
| BB% (unintentional) /PA | 7.49% | ÷0.924 | ×0.600 | — | ×1.027 | 5.00% |
| HBP% /PA | 0.47% | — | ×0.770 | — | ×1.027 | 0.37% |
| Singles /BIP | 21.75% | ÷1.013 | ×0.870 | ×1.039 | ×1.027 | 19.94% |
| Doubles /BIP | 6.17% | ÷1.037 | ×0.780 | ×1.039 | ×1.027 | 4.95% |
| Triples /BIP | 0.32% | ÷0.927 | ×0.850 | ×1.039 | ×1.027 | 0.32% |
| Home runs /BIP | 2.60% | ÷1.043 | ×0.880 | — | ×1.027 | 2.25% |
Factors used: league row South Atlantic League. Park (home-season share, regressed): HR 109, 1B 103, 2B 107, 3B 85, K 92, BB 85 — applied at half strength. Age: age 21 vs a level average of 22.8 → +2.7% on BB/HBP/hit rates (1.8 yr younger than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×1.039.
Result: wOBA .292 → .235; ISO .115 → .092; BABIP .287 → .255. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).
2023 A+Greenville Drive · 247 PAwOBA .320 → .247 (−73)K% 30.0% → 40.0%
| Component | Raw | Park ÷ | Level factor × | GB/FB × | Age × | = MLE |
|---|---|---|---|---|---|---|
| K% /PA | 29.96% | ÷0.981 | ×1.310 | — | — | 40.02% |
| BB% (unintentional) /PA | 10.53% | ÷1.028 | ×0.600 | — | ×1.042 | 6.40% |
| HBP% /PA | 0.81% | — | ×0.770 | — | ×1.042 | 0.65% |
| Singles /BIP | 27.66% | ÷1.053 | ×0.870 | ×1.050 | ×1.042 | 25.01% |
| Doubles /BIP | 8.51% | ÷1.033 | ×0.780 | ×1.050 | ×1.042 | 7.03% |
| Triples /BIP | 1.42% | ÷1.150 | ×0.850 | ×1.050 | ×1.042 | 1.15% |
| Home runs /BIP | 2.13% | ÷0.931 | ×0.880 | — | ×1.042 | 2.10% |
Factors used: league row South Atlantic League. Park (home-season share, regressed): HR 86, 1B 111, 2B 107, 3B 130, K 96, BB 106 — applied at half strength. Age: age 20 vs a level average of 22.8 → +4.2% on BB/HBP/hit rates (2.8 yr younger than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×1.050.
Result: wOBA .320 → .247; ISO .116 → .095; BABIP .376 → .331. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).
2023 ASalem Red Sox · 72 PAwOBA .367 → .290 (−77)K% 30.6% → 42.3%
| Component | Raw | Park ÷ | Level factor × | GB/FB × | Age × | = MLE |
|---|---|---|---|---|---|---|
| K% /PA | 30.56% | ÷0.982 | ×1.360 | — | — | 42.32% |
| BB% (unintentional) /PA | 16.67% | ÷1.052 | ×0.690 | — | ×1.030 | 11.26% |
| HBP% /PA | 2.78% | — | ×0.780 | — | ×1.030 | 2.23% |
| Singles /BIP | 20.59% | ÷1.023 | ×0.920 | — | ×1.030 | 19.06% |
| Doubles /BIP | 14.71% | ÷0.942 | ×0.830 | — | ×1.030 | 13.34% |
| Triples /BIP | 2.94% | ÷1.000 | ×0.910 | — | ×1.030 | 2.76% |
| Home runs /BIP | 2.94% | ÷0.999 | ×0.800 | — | ×1.030 | 2.43% |
Factors used: level-wide A factors (no league-specific row for this league/era). Park (home-season share, regressed): HR 100, 1B 105, 2B 88, 3B 100, K 96, BB 110 — applied at half strength. Age: age 20 vs a level average of 22.0 → +3.0% on BB/HBP/hit rates (2.0 yr younger than average).
Result: wOBA .367 → .290; ISO .179 → .148; BABIP .371 → .339. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).
2022 ROKFCL Red Sox · 51 PAwOBA .324 → .222 (−102)K% 21.6% → 31.0%
| Component | Raw | Park ÷ | Level factor × | GB/FB × | Age × | = MLE |
|---|---|---|---|---|---|---|
| K% /PA | 21.57% | ÷1.000 | ×1.440 | — | — | 31.05% |
| BB% (unintentional) /PA | 13.73% | ÷1.080 | ×0.620 | — | ×1.008 | 7.94% |
| HBP% /PA | 5.88% | — | ×0.720 | — | ×1.008 | 4.27% |
| Singles /BIP | 26.67% | ÷1.010 | ×0.820 | — | ×1.008 | 21.80% |
| Doubles /BIP | 6.67% | ÷1.229 | ×0.720 | — | ×1.008 | 3.93% |
| Triples /BIP | 0.00% | ÷0.908 | ×0.720 | — | ×1.008 | 0.00% |
| Home runs /BIP | 0.00% | ÷0.943 | ×0.780 | — | ×1.008 | 0.00% |
Factors used: level-wide ROK factors (no league-specific row for this league/era). Park (home-season share, regressed): HR 89, 1B 102, 2B 146, 3B 82, K 100, BB 116 — applied at half strength. Age: age 19 vs a level average of 19.5 → +0.8% on BB/HBP/hit rates (0.5 yr younger than average).
Result: wOBA .324 → .222; ISO .049 → .028; BABIP .333 → .257. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).
2021 DSLDSL BOS Blue · 20 PAwOBA .564 → .361 (−203)K% 5.0% → 6.2%
| Component | Raw | Park ÷ | Level factor × | GB/FB × | Age × | = MLE |
|---|---|---|---|---|---|---|
| K% /PA | 5.00% | ÷0.980 | ×1.220 | — | — | 6.22% |
| BB% (unintentional) /PA | 20.00% | ÷1.009 | ×0.700 | — | ×1.008 | 13.98% |
| HBP% /PA | 0.00% | — | ×0.700 | — | ×1.008 | 0.00% |
| Singles /BIP | 40.00% | ÷1.012 | ×0.680 | — | ×1.008 | 27.08% |
| Doubles /BIP | 6.67% | ÷0.999 | ×0.600 | — | ×1.008 | 4.03% |
| Triples /BIP | 0.00% | ÷1.150 | ×0.600 | — | ×1.008 | 0.00% |
| Home runs /BIP | 6.67% | ÷1.458 | ×0.470 | — | ×1.008 | 2.16% |
Factors used: level-wide DSL factors (no league-specific row for this league/era). Park (home-season share, regressed): HR 192, 1B 102, 2B 100, 3B 130, K 96, BB 102 — applied at half strength. Age: age 18 vs a level average of 18.5 → +0.8% on BB/HBP/hit rates (0.5 yr younger than average).
Result: wOBA .564 → .361; ISO .250 → .105; BABIP .500 → .318. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).