2025 Stats
W-L
0-2
ERA
11.42
WHIP
1.85
K
8
SV
0
Rest-of-Season Projections
2025 Fantasy Outlook
For the second straight year, Kirby had the lowest walk rate among qualified starters. He got off to a rocky start with an eight-run blowup in his second outing of the year and a 4.33 ERA through his first 11 starts. However, Kirby then turned in nine consecutive quality starts from June 9 to July 26. Water usually finds its level, and Kirby's 3.53 ERA at the end of the year was pretty much right in line with the underlying skills (3.58 xFIP, 3.56 SIERA). He's reached 190 innings in back-to-back seasons, but that is likely out of reach for 2025 given Kirby will start the year on the year with a shoulder issue. The other problem is that he still has not shown any growth with his strikeout rate, which has hovered right around 23 percent in each of his three seasons in the majors so far. It's not out of the question that the right pitch-mix tweak could unlock another level with the punchouts, but that's purely conjecture at this point. Read Past Outlooks

Falters again Wednesday
Kirby (0-2) took the loss against Washington on Wednesday, allowing six runs on seven hits and two walks while striking out four batters over five innings.
ANALYSIS
Kirby was hit hard in the outing -- four of the Nationals' seven hits against him went for extra bases, and three of those left the yard. The right-hander did go a little deeper with five innings after completing just 3.2 frames against Houston in his season debut May 22, but he's struggled in both outings and has now given up 11 runs through 8.2 innings this season. It's understandable that Kirby has some rust after missing nearly the first two months of the season with a shoulder injury, but his return to action has been frustrating for fantasy managers who held onto the hurler throughout his time on the IL. Kirby at least has a promising matchup lined up for him next, as he's tentatively scheduled to face the Orioles, who have scored the seventh-fewest runs in MLB so far this season.
Kirby was hit hard in the outing -- four of the Nationals' seven hits against him went for extra bases, and three of those left the yard. The right-hander did go a little deeper with five innings after completing just 3.2 frames against Houston in his season debut May 22, but he's struggled in both outings and has now given up 11 runs through 8.2 innings this season. It's understandable that Kirby has some rust after missing nearly the first two months of the season with a shoulder injury, but his return to action has been frustrating for fantasy managers who held onto the hurler throughout his time on the IL. Kirby at least has a promising matchup lined up for him next, as he's tentatively scheduled to face the Orioles, who have scored the seventh-fewest runs in MLB so far this season.
Pitching Stats
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2025
2024
2023
2022
2020
Minor League Game Log

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Pitching Appearances Breakdown
Average Pitch Count
75
Last 10 Games
75
Last 5 Games
75
How many pitches does George Kirby generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does George Kirby generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
-5%
BAA vs RHP
2025
-10%
BAA vs LHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2023vs Left | .255 | 174 | 28 | 177 | 25 | |||
Since 2023vs Right | .243 | 185 | 17 | 196 | 22 | |||
2025vs Left | .348 | 4 | 2 | 8 | 3 | |||
2025vs Right | .385 | 4 | 1 | 5 | 0 | |||
2024vs Left | .257 | 88 | 15 | 86 | 12 | |||
2024vs Right | .234 | 91 | 8 | 95 | 10 | |||
2023vs Left | .246 | 82 | 11 | 83 | 10 | |||
2023vs Right | .247 | 90 | 8 | 96 | 12 | |||
More Splits→ | View More Split Stats |
Home/Away Pitching Splits
Since 2023
-24%
ERA at Home
2025
-12%
ERA at Home
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2023Home | 3.09 | 0.97 | 180.2 | 9.2 | 1.1 | ||||
Since 2023Away | 4.08 | 1.16 | 209.2 | 7.5 | 1.0 | ||||
2025Home | 10.80 | 1.80 | 5.0 | 7.2 | 3.6 | ||||
2025Away | 12.27 | 1.91 | 3.2 | 9.8 | 2.5 | ||||
2024Home | 3.06 | 1.01 | 82.1 | 9.2 | 1.1 | ||||
2024Away | 3.89 | 1.11 | 108.2 | 7.9 | 1.1 | ||||
2023Home | 2.70 | 0.89 | 93.1 | 9.3 | 1.0 | ||||
2023Away | 3.98 | 1.18 | 97.1 | 7.0 | 0.8 | ||||
More Splits→ | View More Split Stats |
Stat Review
How does George Kirby compare to other starting pitchers?
This section compares his stats with all starting pitcher seasons from the previous three seasons (minimum 120 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 120 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 120 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
2.67K/9
8.3BB/9
3.1HR/9
3.1Fastball
96.0 mphERA
11.42WHIP
1.85BABIP
.378GB/FB
2.40Left On Base
42.4%Exit Velocity
80.7 mphBarrels/BBE
0.0%Spin Rate
2092 rpmBalls Hit 95+ MPH
23.1%Swinging Strike
11.3%Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Past Fantasy Outlooks
2024
2023
2022
2021
2020
After being highly touted as a prospect, Kirby showed great promise in his debut season in 2022. The right-hander took his game to another level in his sophomore campaign, shaving his walk rate from 4.1% to a minuscule 2.5%, the lowest among qualified starters. Kirby has already made history multiple times with his strike-throwing; he tossed 24 consecutive strikes at one point as a rookie and now owns the record for the most quality starts with zero walks (11) by a pitcher age 25 or younger. Kirby lowered his WHIP from 1.21 as a rookie to 1.04 last season while adding more than 60 innings to his 2022 total. His five-pitch mix would seem to give him some room for growth in the strikeout department (career 23.5 K%), but until we see that growth, Kirby should probably remain just outside the fantasy ace tier.
More Fantasy News

Struggles in season debut
Kirby (0-1) allowed five runs on six hits and a walk while striking out four over 3.2 innings to take the loss Thursday versus the Astros.
ANALYSIS
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Activated ahead of 2025 debut
The Mariners activated Kirby (shoulder) from the 15-day injured list Thursday.
ANALYSIS
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Set for season debut Thursday
Mariners manager Dan Wilson said Wednesday that Kirby (shoulder) will be activated from the 15-day injured list to start Thursday's game in Houston, Bob Condotta of The Seattle Times reports.
ANALYSIS
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Feels ready to return
Kirby (shoulder) said Sunday that he's ready to rejoin the Mariners after making his third rehab start Friday, though a decision has yet to be made on whether he'll require another outing in the minors before being activated from the injured list, Adam Jude of The Seattle Times reports.
ANALYSIS
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Covers 64 pitches in rehab start
Kirby (shoulder) allowed four earned runs on 10 hits and no walks while striking out four over four innings in his rehab start for Triple-A Tacoma on Friday.
ANALYSIS
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Latest Fantasy Rumors

Not untouchable?
Kirby could be included as part of a package for Shohei Ohtani, speculates Jim Bowden of The Athletic.
ANALYSIS
Kirby, a 2019 first-round pick, owns a 3.43 ERA this season and a 3.41 ERA across 43 career starts. His .266 expected batting average is subpar, but he counters that with excellent control that's evidenced by his 2.4 percent walk rate, which is the best mark among all qualifiers. He's a logically desirable target in the context of an Ohtani blockbuster.
Kirby, a 2019 first-round pick, owns a 3.43 ERA this season and a 3.41 ERA across 43 career starts. His .266 expected batting average is subpar, but he counters that with excellent control that's evidenced by his 2.4 percent walk rate, which is the best mark among all qualifiers. He's a logically desirable target in the context of an Ohtani blockbuster.