Jack Mayfield

Pos2B
B/TR/R
Born1990-09-30
Age (2027)36
No MLB projection yet. Career stats below are historical.
Overview
INTLLAST SEASON 2024
YearAgeLvl / TeamPAAVG/OBP/SLGHRSBwRC+WARMLE AVG/OBP/SLG
202231AAALAA241.247/.294/.4176651—.198/.235/.317
202231MLBLAA74.186/.230/.2711141-0.4
202332INTLCharros de Ja…152.293/.373/.49656143—
202433INTLMexico234.298/.360/.41349116—
202534No MLB games played
202635No MLB games played
Last 3 seasons WAR -0.4
Contract
No contract data on file.
Skills · percentileStatcast 2020-2022
Speed46
Barrel%24
xwOBA10
Avg EV10

Career Stats + Projections

Real MLB stats plus park-adjusted projections — this season (so far / rest / full), then future seasons and career totals.
basis chips: RAW = as recorded · CTX = with park/league context · A+C = actual + context combined · MLE = level/park-neutral
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.

YearAge LvlTeam MLB% PAAB H2B3BHR BBSOHBP SBCS AVGOBPSLGOPS ISOBABIP K%BB% wOBAwRC+ BATRUNFLDPOSREP WAR
▸ Career — actual stats, one row per stint (as recorded, no adjustments)
201322 ROKGreeneville Astros — 11194 24503 9193 22 255340404744 149288 178 321 47 — — — — — —
201423 A+Lancaster JetHawks — 277246 722227 20504 16 293356484839 191337 187 361 73 — — — — — —
201423 AQuad Cities River Bandits — 163147 39902 13261 21 265329367697 102306 168 312 48 — — — — — —
201524 AACorpus Christi Hooks — 196173 45607 19360 31 260333416750 156288 1810 329 61 — — — — — —
201524 A+Lancaster JetHawks — 303271 821347 25465 21 303372458830 155341 158 367 80 — — — — — —
201625 AAAFresno Grizzlies — 149132 26502 11270 21 197259280539 83226 187 238 18 — — — — — —
201625 AACorpus Christi Hooks — 131118 28709 8273 20 237302525828 288226 216 354 65 — — — — — —
201726 AAAFresno Grizzlies — 165154 421206 10301 30 273321468789 195305 186 347 72 — — — — — —
201726 AACorpus Christi Hooks — 291270 7816214 17571 72 289333519852 230317 206 368 78 — — — — — —
201827 AAAFresno Grizzlies — 479433 11731116 33925 54 270329457786 187304 197 342 70 — — — — — —
201827 INTLLeones del Escogido — 9789 19401 6241 00 213271292563 79281 256 256 59 — — — — — —
201928 MLBHouston Astros — 6564 10502 1160 00 156169328497 172174 252 215 29 -5 +0 +2 +5 +1 0.3
201928 AAARound Rock Express — 431380 10926126 37785 71 287358566924 279291 189 393 97 — — — — — —
202029 MLBHouston Astros — 4742 8100 2141 00 190244214459 24276 304 207 25 -4 +0 +3 +0 +1 -0.0
202130 MLBLos Angeles Angels — 290266 5815010 17683 50 218273387660 169254 236 290 83 -6 +1 +3 +1 +6 0.6
202130 AAASalt Lake Bees — 8276 26235 591 11 3423906451.035 303339 116 445 112 — — — — — —
202231 MLBLos Angeles Angels — 7470 13111 3171 10 186230271501 86231 234 228 41 -5 +0 -2 +1 +2 -0.4
202231 AAASalt Lake Bees — 241223 551436 12473 63 247294417711 170285 205 311 51 — — — — — —
202332 INTLCharros de Jalisco — 152133 39825 12265 63 293373496870 203327 178 379 143 — — — — — —
202433 INTLMexico — 234208 621204 15365 92 298360413773 115333 156 340 116 — — — — — —
▸ Career Totals (raw MLB only — historical actual)
MLB Career— — 476442 8922113 231155 60 201249344593 143241 245 262 63 -21 +1 +6 +8 +10 0.5
▸ Career — adjusted (every ACTUAL line translated to park/league-neutral MLB equivalents)
201322 ROK MLEGreeneville Astros — 11197 19402 6273 22 196264299563 103224 245 238 47 — — — — — —
201423 A+ MLELancaster JetHawks — 277252 581725 14714 16 230281373654 143279 265 276 73 — — — — — —
201423 A MLEQuad Cities River Bandits — 163152 32701 8351 21 211255276531 66254 215 239 48 — — — — — —
201524 AA MLECorpus Christi Hooks — 196179 38505 13460 31 212266324590 112242 237 258 61 — — — — — —
201524 A+ MLELancaster JetHawks — 303279 671026 17675 21 240296355651 115290 226 286 80 — — — — — —
201625 AAA MLEFresno Grizzlies — 149135 23402 8350 21 170217244461 74196 235 195 18 — — — — — —
201625 AA MLECorpus Christi Hooks — 131120 22506 6313 20 183240375615 192186 245 265 65 — — — — — —
201726 AAA MLEFresno Grizzlies — 165157 361005 7391 30 229267389655 159268 244 274 72 — — — — — —
201726 AA MLECorpus Christi Hooks — 291277 6413210 10711 72 231260401661 170265 243 284 78 — — — — — —
201827 AAA MLEFresno Grizzlies — 479443 9824113 231215 54 221268368635 147260 255 271 70 — — — — — —
201928 MLB MLEHouston Astros — 6564 10502 1160 00 156169328497 172174 252 211 29 -5 +0 +2 +5 +1 0.3
201928 AAA MLERound Rock Express — 431392 9120121 25985 71 232287449736 217238 236 312 97 — — — — — —
202029 MLB MLEHouston Astros — 4742 8100 2141 00 190244214459 24276 304 205 25 -4 +0 +3 +0 +1 -0.0
202130 MLB MLELos Angeles Angels — 290266 5916010 17683 50 222276395671 173254 236 291 83 -6 +1 +3 +1 +6 0.6
202130 AAA MLESalt Lake Bees — 8279 21224 2111 11 266293494786 228267 132 333 112 — — — — — —
202231 MLB MLELos Angeles Angels — 7470 13111 3171 10 186230271501 86231 234 228 41 -5 +0 -2 +1 +2 -0.4
202231 AAA MLESalt Lake Bees — 241227 451124 8573 63 198235317552 119245 243 243 51 — — — — — —
201322 ROK MLEGreeneville Astros — 11197 19402 6273 22 196264299563 103246 245 238 47 — — — — — —
201322 ROK RAWGreeneville Astros — 11194 24503 9193 22 255340404744 149288 178 321 47 — — — — — —
201423 A+ MLE2 teams — 440404 892426 221065 37 220269334603 114279 245 262 64 — — — — — —
201423 A+ RAW2 teams — 440393 1113129 33765 37 282346440786 158325 178 343 64 — — — — — —
201524 A+ MLE2 teams — 499458 10615212 301125 52 231286352638 120278 226 275 72 — — — — — —
201524 A+ RAW2 teams — 499444 12719414 44825 52 286357441798 155321 169 352 72 — — — — — —
201625 AAA MLE2 teams — 280255 45908 14663 41 176228306534 129199 245 228 40 — — — — — —
201625 AAA RAW2 teams — 280250 5412011 19543 41 216279396675 180226 197 292 40 — — — — — —
201726 AA MLE2 teams — 456434 9923215 171102 102 228260394654 166269 244 280 76 — — — — — —
201726 AA RAW2 teams — 456424 12028220 27872 102 283329500829 217312 196 361 76 — — — — — —
201827 AAA MLE2 teams — 576534 11729115 271456 54 219265361626 142268 255 271 70 — — — — — —
201827 AAA RAW2 teams — 576522 13635117 391166 54 261319429748 169301 207 328 70 — — — — — —
201928 AAA MLE2 teams — 496456 10125123 261145 71 221271432703 211238 235 299 88 — — — — — —
201928 AAA RAW2 teams — 496444 11931128 38945 71 268333532864 264275 198 369 88 — — — — — —
202029 MLB MLEHouston Astros — 4742 8100 2141 00 190244214459 24276 304 205 25 -4 +0 +3 +0 +1 -0.0
202029 MLB RAWHouston Astros — 4742 8100 2141 00 190244214459 24276 304 207 25 -4 +0 +3 +0 +1 -0.0
202130 MLB MLE2 teams — 372345 7917214 19794 61 229277412689 183257 215 300 89 -5 +1 +3 +1 +8 0.9
202130 MLB RAW2 teams — 372342 8417315 22774 61 246299444743 199275 216 324 89 -5 +1 +3 +1 +8 0.9
202231 AAA MLE2 teams — 315297 581235 11744 73 195234306540 111241 233 240 48 — — — — — —
202231 AAA RAW2 teams — 315293 681547 15644 73 232279382661 150272 205 291 48 — — — — — —
202332 INTL MLECharros de Jalisco — 152133 39825 12265 63 293373496870 203327 178 — — — — — — — —
202332 INTL RAWCharros de Jalisco — 152133 39825 12265 63 293373496870 203327 178 379 143 — — — — — —
202433 INTL MLEMexico — 234208 621204 15365 92 298360413773 115333 156 — — — — — — — —
202433 INTL RAWMexico — 234208 621204 15365 92 298360413773 115333 156 340 116 — — — — — —
201322 ROK MLEGreeneville Astros — 111101 19402 6273 22 188264287551 99224 245 238 47 — — — — — —
201423 A+ MLE2 teams — 440410 892426 221065 37 217269329598 112270 245 262 64 — — — — — —
201524 A+ MLE2 teams — 499461 10615212 301125 52 230286349635 119271 226 275 72 — — — — — —
201625 AAA MLE2 teams — 280261 45908 14663 41 172228299527 126191 245 228 40 — — — — — —
201726 AA MLE2 teams — 456434 9923215 171102 102 228260394654 166266 244 280 76 — — — — — —
201827 AAA MLE2 teams — 576538 11729115 271456 54 217265359623 141260 255 271 70 — — — — — —
201928 AAA MLE2 teams — 496462 10125123 261145 71 219271426697 208230 235 299 88 — — — — — —
202029 MLB MLEHouston Astros — 4744 8100 2141 00 182244205449 23276 304 205 25 — — — — — —
202130 MLB MLE2 teams — 372346 7917214 19794 61 228277410688 182257 215 300 89 — — — — — —
202231 AAA MLE2 teams — 315297 581235 11744 73 195234306540 111242 233 240 48 — — — — — —
▸ Career Totals
▸ Career totals — MLB only (actual + projected)
Career— A+C — 476442 8922113 231155 60 201249344593 143241 245 262 51 -21 +1 +6 +8 +10 0.5
/ 162G— A+C — 650604 12130118 311577 80 200248343590 142238 245 262 51 -28 +2 +8 +11 +14 0.6
Career— MLE — 39783663 82217915109 20190948 6428 224274371645 146265 235 244 51 -21 +1 +6 +8 +10 0.5
/ 162G— MLE — 650599 13429218 331498 105 224274369643 145264 235 244 51 -28 +2 +8 +11 +14 0.6

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.

2022 AAASalt Lake Bees · 241 PAwOBA .304 → .243 (−61)K% 19.5% → 23.7%
ComponentRawPark ÷Level factor ×GB/FB ×Age ×= MLE
K% /PA19.50%÷0.989×1.200——23.67%
BB% (unintentional) /PA4.98%÷1.034×0.690—×0.9523.16%
HBP% /PA1.24%—×0.940—×0.9521.11%
Singles /BIP18.18%÷0.993×0.930×1.003×0.95216.26%
Doubles /BIP7.95%÷0.956×0.830×1.003×0.9526.59%
Triples /BIP1.70%÷1.150×0.970×1.003×0.9521.37%
Home runs /BIP3.41%÷0.978×0.700—×0.9522.32%

Factors used: league row International League. Park (home-season share, regressed): HR 96, 1B 99, 2B 91, 3B 130, K 98, BB 107 — applied at half strength. Age: age 32 vs a level average of 27.2 → −4.8% on BB/HBP/hit rates (4.8 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×1.003.

Result: wOBA .304 → .243; ISO .170 → .127; BABIP .285 → .245. 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 AAASalt Lake Bees · 82 PAwOBA .429 → .333 (−97)K% 11.0% → 13.4%
ComponentRawPark ÷Level factor ×GB/FB ×Age ×= MLE
K% /PA10.98%÷0.982×1.200——13.41%
BB% (unintentional) /PA4.88%÷1.090×0.690—×0.9622.97%
HBP% /PA1.22%—×0.940—×0.9621.10%
Singles /BIP23.88%÷1.032×0.930×0.950×0.96219.67%
Doubles /BIP2.99%÷1.002×0.830×0.950×0.9622.26%
Triples /BIP4.48%÷1.150×0.920×0.950×0.9623.27%
Home runs /BIP7.46%÷0.907×0.700—×0.9625.54%

Factors used: level-wide AAA factors (no league-specific row for this league/era). Park (home-season share, regressed): HR 81, 1B 106, 2B 100, 3B 130, K 96, BB 118 — applied at half strength. Age: age 31 vs a level average of 27.2 → −3.8% on BB/HBP/hit rates (3.8 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.950.

Result: wOBA .429 → .333; ISO .303 → .226; BABIP .339 → .267. 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).

2019 AAARound Rock Express · 431 PAwOBA .390 → .312 (−78)K% 18.1% → 22.8%
ComponentRawPark ÷Level factor ×GB/FB ×Age ×= MLE
K% /PA18.10%÷1.022×1.290——22.84%
BB% (unintentional) /PA8.58%÷1.030×0.710—×0.9825.81%
HBP% /PA1.16%—×0.980—×0.9821.12%
Singles /BIP18.54%÷0.966×0.900×0.950×0.98216.12%
Doubles /BIP8.61%÷0.995×0.810×0.950×0.9826.54%
Triples /BIP0.33%÷1.126×0.810×0.950×0.9820.22%
Home runs /BIP8.61%÷0.948×0.780—×0.9826.96%

Factors used: league row PCL. Park (home-season share, regressed): HR 90, 1B 93, 2B 99, 3B 125, K 104, BB 106 — applied at half strength. Age: age 29 vs a level average of 27.2 → −1.8% on BB/HBP/hit rates (1.8 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.950.

Result: wOBA .390 → .312; ISO .279 → .222; BABIP .291 → .238. 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).

2018 AAAFresno Grizzlies · 479 PAwOBA .338 → .271 (−66)K% 19.2% → 25.2%
ComponentRawPark ÷Level factor ×GB/FB ×Age ×= MLE
K% /PA19.21%÷0.982×1.290——25.22%
BB% (unintentional) /PA6.89%÷1.025×0.710—×0.9924.74%
HBP% /PA1.04%—×0.980—×0.9921.01%
Singles /BIP20.23%÷0.962×0.900×0.965×0.99218.13%
Doubles /BIP9.09%÷0.974×0.810×0.965×0.9927.23%
Triples /BIP0.29%÷1.150×0.810×0.965×0.9920.20%
Home runs /BIP4.69%÷0.951×0.780—×0.9923.82%

Factors used: league row PCL. Park (home-season share, regressed): HR 90, 1B 92, 2B 95, 3B 130, K 96, BB 105 — applied at half strength. Age: age 28 vs a level average of 27.2 → −0.8% on BB/HBP/hit rates (0.8 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.965.

Result: wOBA .338 → .271; ISO .187 → .146; BABIP .304 → .260. 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).

2017 AACorpus Christi Hooks · 291 PAwOBA .360 → .284 (−76)K% 19.6% → 24.4%
ComponentRawPark ÷Level factor ×GB/FB ×Age ×= MLE
K% /PA19.59%÷0.980×1.220——24.39%
BB% (unintentional) /PA5.50%÷1.056×0.700—×0.9783.57%
HBP% /PA0.34%—×0.870—×0.9780.29%
Singles /BIP21.60%÷1.014×0.920×0.963×0.97818.46%
Doubles /BIP7.51%÷0.964×0.840×0.963×0.9786.17%
Triples /BIP0.94%÷0.900×0.940×0.963×0.9780.92%
Home runs /BIP6.57%÷1.035×0.800—×0.9784.97%

Factors used: league row TL. Park (home-season share, regressed): HR 107, 1B 103, 2B 93, 3B 80, K 96, BB 111 — applied at half strength. Age: age 27 vs a level average of 24.8 → −2.2% on BB/HBP/hit rates (2.2 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.963.

Result: wOBA .360 → .284; ISO .230 → .177; BABIP .317 → .265. 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).

2017 AAAFresno Grizzlies · 165 PAwOBA .338 → .274 (−64)K% 18.2% → 23.6%
ComponentRawPark ÷Level factor ×GB/FB ×Age ×= MLE
K% /PA18.18%÷0.992×1.290——23.64%
BB% (unintentional) /PA6.06%÷1.028×0.710—×1.0034.20%
HBP% /PA0.61%—×0.980—×1.0030.60%
Singles /BIP19.35%÷0.978×0.900×0.978×1.00317.47%
Doubles /BIP9.68%÷0.926×0.810×0.978×1.0038.30%
Triples /BIP0.00%÷1.150×0.810×0.978×1.0030.00%
Home runs /BIP4.84%÷0.963×0.780—×1.0033.93%

Factors used: league row PCL. Park (home-season share, regressed): HR 93, 1B 96, 2B 85, 3B 130, K 98, BB 106 — applied at half strength. Age: age 27 vs a level average of 27.2 → +0.3% on BB/HBP/hit rates (0.2 yr younger than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.978.

Result: wOBA .338 → .274; ISO .195 → .154; BABIP .305 → .268. 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).

2016 AAAFresno Grizzlies · 149 PAwOBA .237 → .195 (−41)K% 18.1% → 23.5%
ComponentRawPark ÷Level factor ×GB/FB ×Age ×= MLE
K% /PA18.12%÷0.996×1.290——23.46%
BB% (unintentional) /PA7.38%÷1.008×0.710—×1.0185.30%
HBP% /PA0.00%—×0.980—×1.0180.00%
Singles /BIP18.10%÷1.000×0.900×0.981×1.01816.26%
Doubles /BIP4.76%÷1.061×0.810×0.981×1.0183.63%
Triples /BIP0.00%÷1.150×0.810×0.981×1.0180.00%
Home runs /BIP1.90%÷1.040×0.780—×1.0181.45%

Factors used: league row PCL. Park (home-season share, regressed): HR 108, 1B 100, 2B 112, 3B 130, K 99, BB 102 — applied at half strength. Age: age 26 vs a level average of 27.2 → +1.8% on BB/HBP/hit rates (1.2 yr younger than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.981.

Result: wOBA .237 → .195; ISO .083 → .064; BABIP .226 → .196. 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).

2016 AACorpus Christi Hooks · 131 PAwOBA .349 → .265 (−84)K% 20.6% → 23.8%
ComponentRawPark ÷Level factor ×GB/FB ×Age ×= MLE
K% /PA20.61%÷1.055×1.220——23.82%
BB% (unintentional) /PA6.11%÷0.932×0.700—×0.9884.53%
HBP% /PA2.29%—×0.870—×0.9881.97%
Singles /BIP13.19%÷0.967×0.920×0.951×0.98811.79%
Doubles /BIP7.69%÷1.017×0.840×0.951×0.9885.97%
Triples /BIP0.00%÷0.977×0.940×0.951×0.9880.00%
Home runs /BIP9.89%÷1.196×0.800—×0.9886.54%

Factors used: league row TL. Park (home-season share, regressed): HR 139, 1B 93, 2B 103, 3B 95, K 111, BB 86 — applied at half strength. Age: age 26 vs a level average of 24.8 → −1.2% on BB/HBP/hit rates (1.2 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.951.

Result: wOBA .349 → .265; ISO .288 → .198; BABIP .226 → .186. 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).

Not traceable per stint: some stints lack the counting stats the component translation needs. Level-wide factors that apply instead — .