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George Kirby
MLB
About George Kirby
George Joseph Kirby (born February 4, 1998) is an American professional baseball pitcher for the Seattle Mariners of Major League Baseball (MLB). He made his MLB debut in 2022. The Mariners selected Kirby in the first round of the 2019 MLB draft out of Elon University. He was an All-Star in 2023. Known for his command, Kirby has the highest strikeout-to-walk ratio and second-lowest walk rate among qualified starting pitchers since 1950. He holds the record for the highest strikeout-to-walk ratio through a pitcher's first 50 MLB starts.
Bio summary from Wikipedia.
Player Stats
| W | 9 | L | 11 | ERA | 4.33 | G | 30 |
|---|---|---|---|---|---|---|---|
| GS | 30 | SV | 0 | IP | 174.2 | H | 197 |
| R | 89 | ER | 84 | BB | 47 | SO | 148 |
| WHIP | 1.397 | H/9 | 10.2 | HR/9 | 1.1 | BB/9 | 2.4 |
| K/9 | 7.6 | FIP | 3.90 | WAR | 1.4 |
2026 pitching — Baseball-Reference
Career — Lahman, through 2025
Pitching
| Year | Team | W | L | ERA | G | GS | CG | SHO | SV | IP | H | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | SEA | 8 | 5 | 3.39 | 25 | 25 | 0 | 0 | 0 | 130.0 | 135 | 13 | 22 | 133 |
| 2023 | SEA | 13 | 10 | 3.35 | 31 | 31 | 1 | 0 | 0 | 190.2 | 179 | 22 | 19 | 172 |
| 2024 | SEA | 14 | 11 | 3.53 | 33 | 33 | 0 | 0 | 0 | 191.0 | 181 | 22 | 23 | 179 |
| 2025 | SEA | 10 | 8 | 4.21 | 23 | 23 | 0 | 0 | 0 | 126.0 | 121 | 15 | 29 | 137 |
Season lines from the Lahman Baseball Database (Version 2025, via SABR), joined through the Chadwick Register ID crosswalk. The databank runs through the 2025 season — the current season is the 2026 line below, from the MLB Stats API.
2026 Season — MLB Stats API
Pitching
| W | L | ERA | G | GS | CG | SHO | SV | IP | H | R | ER | HR | BB | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9 | 11 | 4.33 | 30 | 30 | 1 | 0 | 0 | 174.2 | 197 | 89 | 84 | 22 | 47 | 148 | 1.40 |
2026 regular-season line from the MLB Stats API (statsapi.mlb.com), pulled when this page was built. Multi-team stints are combined; rate stats are recomputed from the combined totals.
Watch George Kirby Highlights
“George Kirby Full 2025 Seattle Mariners Highlights” · Open on YouTube · More George Kirby videos