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Stephen Kolek
For pitchers we lead with FIP (Fielding Independent Pitching — what ERA should be if defense were league average; a 4.00 FIP is roughly average), K% and BB% (strikeout and walk rate per batter faced, the most predictive rate stats for future ERA), and BABIP against (around .300 is neutral; lower often means good defense or weak contact, higher can signal bad luck or hard contact allowed). ERA, WHIP, and raw IP are still here — but FIP tends to be the better predictor of next-season performance.
The radar chart below normalizes each metric so that 100 equals league average; anything above the dotted ring means the player is beating the league, and bigger polygons mean broader excellence. For a full glossary with formulas and worked examples, visit the Learn section. If you want to compare this player head-to-head with another, jump to the Matchup tool.
FIP
5.91
BABIP
0.2
K%
20
BB%
6.7
FIP: Fielding Independent Pitching — evaluates only pitcher-controlled outcomes
K%: Strikeout rate against opposing batters
BB%: Walk rate against opposing batters
| Season | G | W | L | ERA | IP | SO | BB | WHIP | HR |
|---|---|---|---|---|---|---|---|---|---|
| 2024 | 42 | 3 | 0 | 5.21 | 46.2 | 39 | 12 | 1.52 | 4 |
| 2025 | 14 | 4 | 5 | 4.18 | 79.2 | 56 |
G
2
GS
2
W
1
L
0
ERA
6.75
IP
10.2
SO
9
BB
3
Hits
9
HR
3
WHIP
1.13
SV
0
| Date | Opp | IP | H | R | ER | BB | K | HR | ERA |
|---|---|---|---|---|---|---|---|---|---|
| - | Kansas City Royals | 6.0 | 4 | 3 | 3 | 0 | 3 | 1 | 4.50 |
| - | Kansas City Royals | 4.2 | 5 | 5 | 5 | 3 | 6 | 2 | 6.75 |
| 26 |
| 1.31 |
| 8 |
| 2025 | 5 | 1 | 2 | 1.91 | 33.0 | 21 | 5 | 0.76 | 1 |
| 2025 | 19 | 5 | 7 | 3.51 | 112.2 | 77 | 31 | 1.14 | 9 |
| 2026 | 2 | 1 | 0 | 6.75 | 10.2 | 9 | 3 | 1.13 | 3 |