Mason Olson
P
New Hampshire Fisher Cats
Age 24
LHP
5'10" / 165 lbs
AA
peak 0.1 · 2026
2026 ROS PROJECTION55 act + 22 ip · rates below = ROS only
wRC+ AGAINSTvL 98107vR 117
ERA4.29
FIP4.29
K%22.7%
BB%9.3%
K-BB%13.4%
ROS IP22
Value2026 · WAR
Runs saved vs league avg · 76 IP
Grades · Contract
Contract
No contract data on file. Pre-MLB players and minor-league free agents do not yet have salary projections — entries are added at first 40-man roster placement.
Career Stats + Projections
Viewactual = stats as recorded (seasons combined) + projected real-world MLB lines · MLE = level/park-neutral translations
Methodology▸ how WAR & MLE are computed
Stats are park-neutral MLB equivalents. The "TEAM" column shows current org affiliation only — we do NOT project at that team's park.
Rates (K%, BB%, HR-BF) are park-stripped; MiLB stat lines are translated to their MLB-equivalent via per-level MLE factors.
WAR is computed from projected runs prevented vs a replacement pitcher (the marginal arm a team would call up if this pitcher were unavailable) — calibrated to industry-standard fWAR.
| Year | Age | Lvl | Team | G | GS | IP | BF | K | BB | HR | GS% | IP/G | K% | BB% | K-BB% | HR% | ERA | FIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 23 | MIX | 2 levels | 9 | 4 | 36 | 149 | 39 | 12 | 0 | 44% | 4.0 | 18.6% | 9.7% | 9.0% | 0.0% | 2.72 | 2.75 | — |
| 2025 | 23 | MIX | 2 levels | 9 | 4 | 36 | 149 | 39 | 12 | 0 | 44% | 4.0 | 26.2% | 8.1% | 18.1% | 0.0% | 2.72 | 1.94 | — |
| ▸ 2026 Season | |||||||||||||||||||
| 2026 | 24 | AA | New Hampshire Fisher Cats | 20 | 3 | 55 | 233 | 68 | 13 | 6 | 15% | 2.7 | 24.0% | 6.0% | 18.0% | 3.3% | 3.79 | 3.64 | +0.6 |
| ROS | 24 | MLB | TOR | 21 | 0 | 22 | 91 | 21 | 9 | 3 | 0% | 1.0 | 22.7% | 9.3% | 13.4% | 2.8% | 4.29 | 4.29 | +0.1 |
| ROS | 24 | MLB | TOR | — | — | 0 | — | — | — | — | — | — | 22.7% | 9.3% | 13.4% | 2.8% | 4.29 | 4.29 | — |
| 2026 TOT | 24 | MLB | TOR | — | — | 76 | 324 | 89 | 22 | 9 | — | — | 27.4% | 6.6% | 20.7% | 2.6% | 3.93 | 3.82 | +1.0 |
| 2026 FULL | 24 | MLB | TOR | — | — | 0 | 2 | 0 | 0 | 0 | — | — | 22.7% | 9.3% | 13.4% | 2.8% | 4.29 | 3.91 | +0.0 |
| ▸ 2027+ Projections WITH CONTEXT · MLB TIME ONLY ⓘ | |||||||||||||||||||
| 2027 | 25 | MLB | TOR | 21 | 0 | 22 | 92 | 21 | 8 | 3 | 0% | 1.0 | 23.2% | 9.0% | 14.1% | 2.8% | 4.24 | 4.21 | +0.1 |
| 2027 | 25 | MLB | TOR | 10 | 0 | 10 | 42 | 10 | 4 | 1 | 0% | 1.0 | 23.2% | 9.0% | 14.1% | 2.8% | 4.24 | 4.21 | +0.0 |
| ▸ Career (MLB actual + context projections) | |||||||||||||||||||
| Career | — | 10 | 0 | 10 | 42 | 10 | 4 | 1 | 0% | 1.0 | 23.1% | 9.1% | 14.1% | 2.8% | 4.24 | 3.84 | +0.1 | ||
| / 200 IP | — | 190 | 0 | 200 | 844 | 199 | 80 | 20 | 0% | 1.1 | 23.1% | 9.1% | 14.1% | 2.8% | 4.24 | 3.84 | +3.7 | ||
| Career | — | 29 | 7 | 91 | 382 | 84 | 28 | 8 | 24% | 3.1 | 21.9% | 7.5% | 14.5% | 2.0% | 3.36 | 3.29 | +2.0 | ||
| / 200 IP | — | 64 | 15 | 200 | 840 | 184 | 63 | 17 | 24% | 3.1 | 21.9% | 7.5% | 14.5% | 2.0% | 3.36 | 3.29 | +4.9 | ||
Career Path Comps
What happened to similar pitchers from this age · Y-axis: ERA+ (100 = league avg, 150 = elite, 80 = below) · Bands: P10–P90 outer, P25–P75 inner · Gold: OGILVIE projection
| Profile at Match Age | Next 3 Yrs | Career | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comp | Age | Role | FIP | K% | BB% | HR/BF | BABIP | FIP | K% | K-BB% | IP | ΔFIP | Low FIP | IP | Match |
| Mason Olson (OGILVIE) | — | — | 4.29 | 22.7% | 9.3% | 2.8% | — | 4.21 | 23.2% | 14.1% | 22 | -0.08 | — | — | — |
| Ethan Flanagan L 2026 · 4.23 FIP | 24 | SW | 4.23 | 21.3% | 6.5% | 3.9% | .331 | — | — | — | — | — | 3.43 | 102 | 78 |
| Jake Rice L 2026 · 3.29 FIP | 24 | SU | 3.29 | 24.7% | 6.2% | 2.7% | .294 | 4.56 | 21.5% | 6.0% | 130 | +1.27 | 3.29 | 199 | 76 |
| Jordan Woods L 2024 · 3.74 FIP | 22 | SW | 3.74 | 24.2% | 10.4% | 2.5% | .287 | — | — | — | — | — | 3.74 | 143 | 75 |
| Andrew Barbosa L 2029 · 3.30 FIP | 27 | SW | 3.30 | 22.8% | 12.2% | 1.1% | .292 | 3.80 | 20.2% | 11.3% | 127 | +0.50 | 2.68 | 175 | 75 |
| Sean Mellen L 2026 · 3.97 FIP | 24 | SU | 3.97 | 21.3% | 10.4% | 2.5% | .285 | — | — | — | — | — | 3.97 | 101 | 74 |
| Garrett Irvin L 2026 · 4.53 FIP | 24 | SU | 4.53 | 23.2% | 11.6% | 3.5% | .283 | 4.48 | 17.7% | 2.9% | 39 | -0.05 | 4.48 | 110 | 74 |
| Samuel Strickland L 2026 · 4.86 FIP | 24 | SW | 4.86 | 19.5% | 7.3% | 4.5% | .337 | 3.71 | 20.5% | 14.3% | 133 | -1.15 | 3.09 | 277 | 73 |
| R.C. Orlan L 2026 · 4.01 FIP | 24 | SU | 4.01 | 21.0% | 10.9% | 2.4% | .326 | 4.55 | 17.2% | 5.0% | 119 | +0.54 | 1.71 | 206 | 73 |
| Mac Lardner L 2026 · 5.23 FIP | 24 | SW | 5.23 | 17.4% | 9.4% | 4.4% | .318 | 3.54 | 17.5% | 8.1% | 62 | -1.69 | 3.54 | 186 | 72 |
| Garrett Schoenle L 2026 · 4.66 FIP | 24 | SW | 4.66 | 21.4% | 10.8% | 3.6% | .263 | 4.29 | 21.0% | 9.5% | 219 | -0.37 | 2.34 | 338 | 71 |
| Andy Fisher L 2025 · 3.28 FIP | 23 | SU | 3.28 | 22.8% | 4.5% | 2.8% | .242 | 3.67 | 23.5% | 8.7% | 89 | +0.39 | 3.14 | 167 | 71 |
| Garrett Gainey L 2027 · 3.65 FIP | 25 | SW | 3.65 | 17.6% | 6.0% | 2.3% | .257 | 5.52 | 17.8% | 9.6% | 53 | +1.87 | 3.65 | 116 | 71 |
| Christian Jones L 2026 · 3.30 FIP | 24 | SU | 3.30 | 18.5% | 7.4% | 1.5% | .319 | 4.09 | 15.0% | 3.7% | 89 | +0.79 | 3.30 | 161 | 71 |
| Nick Maronde L 2027 · 3.67 FIP | 25 | SW | 3.67 | 18.3% | 8.9% | 1.8% | .359 | 3.64 | 16.3% | 8.9% | 48 | -0.03 | 3.64 | 133 | 70 |
| Tyler Holton L 2027 · 3.18 FIP | 25 | SW | 3.18 | 22.0% | 6.6% | 2.0% | .393 | 3.47 | 22.0% | 16.1% | 224 | +0.29 | 3.02 | 409 | 70 |
| Matt Walker L 2026 · 4.74 FIP | 24 | SW | 4.74 | 17.7% | 12.8% | 2.7% | .338 | 4.62 | 12.7% | 2.7% | 41 | -0.12 | 4.27 | 156 | 70 |
| Brady Basso L 2025 · 3.99 FIP | 23 | SP- | 3.99 | 21.8% | 8.7% | 3.0% | .333 | 4.17 | 22.1% | 15.5% | 179 | +0.18 | 2.24 | 269 | 70 |
| Randy Labaut L 2026 · 5.06 FIP | 24 | SU | 5.06 | 23.2% | 14.0% | 3.9% | .240 | 4.73 | 19.5% | 5.0% | 190 | -0.33 | 1.91 | 302 | 70 |
| Ben Griset L 2026 · 3.43 FIP | 24 | SU | 3.43 | 21.1% | 9.1% | 1.8% | .255 | 3.64 | 14.5% | 3.6% | 49 | +0.21 | 2.91 | 148 | 70 |
| Austin Hamilton L 2026 · 4.37 FIP | 24 | SW | 4.37 | 14.6% | 6.5% | 3.1% | .323 | 4.06 | 17.3% | 9.4% | 68 | -0.31 | 4.06 | 135 | 70 |