William
Olson
PAge : 27Throws : R
#45
Reese Olson
#45P
Detroit Tigers
Height : 6' 1" · Weight : 73 kg · Bats : R · Throws : R · MLB debut : 2023-06-02
Born in : Gainesville, GA, USA
MLB record
| Year | Team | PJ | V | D | MPM | MJ | RB | WHIP |
|---|---|---|---|---|---|---|---|---|
| 2025 | Detroit Tigers | 13 | 4 | 4 | 3.15 | 68.2 | 65 | 1.21 |
| 2024 | Detroit Tigers | 22 | 4 | 8 | 3.53 | 112.1 | 101 | 1.18 |
| 2023 | Detroit Tigers | 21 | 5 | 7 | 3.99 | 103.2 | 103 | 1.12 |
| Career totals | 56 | 13 | 19 | 3.60 | 284.2 | 269 | 1.17 | |
ContractDetroit Tigers payroll →
- Type
- Pre-Arbitration
- Length
- 1 yr · 2026–2026
- Total value
- 0.8 M$
- AAV
- 0.82 M$
2026
0.82 M$
Pre-arb
2027
—
Arb 1
2028
—
Arb 2
2029
—
Arb 3
Advanced stats, 2025Starting pitcherMLB stats →
ERA
3.15
FIP
3.50
xFIP
4.03
ERA-
76
WHIP
1.21
K%
22.8 %
BB%
8.8 %
Strikeouts
65
Innings
68.7
Wins
4
Stats: MLB (statsapi) and Baseball Savant.
2026 projectionMLB trends →
Projected WAR
1.9
Strikeouts
86
2025 WAR
1.4
This season's pace, over the average of the last two workloads, adjusted for next year's age.
Trend
→ Stable (-2)
- 20231.5 WAR · 2.6 per full season
- 20242.5 WAR · 4.0 per full season
- 20251.4 WAR · 3.7 per full season
Outlook, age included
+23 · 25 y.o. · usually still improving
It is only a projection. It knows nothing about injuries, trades or role changes.
Player ratings, 2025All ratings →
Ratings from 0 to 100, computed from Statcast and MLB stats over four seasons, never by hand. 75 = established regular, 87 = 90th percentile, 95+ = elite.
OV · Overall
72
Established regular
- VEL
- Velocity
- 76
- STF
- Stuff
- 76
- CTL
- Control
- 72
- CNT
- Contact allowed
- 75
- STA
- Stamina
- 61
- DUR
- Durability
- 65
- EX
- Experience
- 47
Why these ratings?Hide details
- VEL — Velocity : Fastball velocity
- STF — Stuff : Strikeouts, K − BB
- CTL — Control : Walks avoided
- CNT — Contact allowed : xwOBA, barrels and hard-hit balls allowed
- STA — Stamina : Innings per start and innings pitched
- DUR — Durability : Games played over several seasons
- EX — Experience : Seasons in the majors
WAR and PAL Rating, 2025How we rate →
WAR is fWAR (FanGraphs' version, distributed through MLB's API): wins added above a replacement player. PAL Rating scores performance from 0 to 100 against regulars in the same role (50 = median).
PAL: dimensions
A pitcher's WAR
Computed by MLB from FIP (strikeouts, walks, home runs). FIP: 3.50 · RA9-WAR: 1.9
StatcastStatcast leaderboards →
MLB's tracking of every ball, 2025 season. The percentile ranks the player among regulars in the role: 90th means better than 90% of them.
Fastball
94.3 mi/h
58th percentile
K%
22.8 %
57th percentile
BB%
8.8 %
29th percentile
xERA
4.07
56th percentile
xwOBA allowed
.313
56th percentile
Barrels allowed
7.4 %
77th percentile
| Season | Team | WAR | PAL | OV | Fastball | K% | BB% | xERA | xwOBA allowed |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | DET | 1.4 | 55 | 72 | 94.3 | 22.8 | 8.8 | 4.07 | .313 |
| 2024 | DET | 2.5 | 63 | 74 | 94.2 | 21.7 | 7.1 | 3.62 | .299 |
| 2023 | DET | 1.5 | 55 | 72 | 94.8 | 24.4 | 7.8 | 4.70 | .332 |
Game log, 2025
| Date | Opponent | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Jul 24 | vs TOR | 5.2 | 6 | 5 | 2 | 4 | 3.15 |
| Jul 18 | @ TEX | 5.0 | 2 | 0 | 1 | 6 | 2.71 |
| Jul 9 | vs TB | 5.0 | 6 | 2 | 2 | 1 | 2.95 |
| Jul 4 | @ CLE | 4.1 | 6 | 1 | 1 | 3 | 2.89 |
| May 17 | @ TOR | 6.0 | 1 | 0 | 1 | 6 | 2.96 |
| May 11 | vs TEX | 4.0 | 7 | 3 | 1 | 5 | 3.38 |
| May 4 | @ LAA | 5.2 | 3 | 0 | 3 | 8 | 3.03 |
| Apr 29 | @ HOU | 5.2 | 4 | 3 | 3 | 7 | 3.55 |
| Apr 23 | vs SD | 7.1 | 2 | 0 | 1 | 7 | 3.29 |
| Apr 17 | vs KC | 5.0 | 4 | 0 | 2 | 5 | 4.50 |