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George Kirby
#
68
Team
SEA · P
Debut
2022 · 5 MLB seasons

George Kirby

Age 28
Contract Value $6,550,000/yr
Size 6' 4" · 215
Throws RHP
Bats Right
From Rye, NY
8-8 W-L
3.57
ERA
1.28
WHIP
8.1
K/9
1.9
BB/9
116.0
Innings
19
Starts
George Kirby season snapshot
Season stats
ERA
3.57
WHIP
1.28
K/9
8.1
BB/9
1.9
HR/9
0.85
IP
116.0
GS
19
W-L
8-8
◆ Pitcher snapshot

George Kirby, a starter for the Seattle Mariners, has worked through 19 starts and 116.0 innings with a 8-8 record while posting a 3.57 ERA and 1.28 WHIP. The R-hander has shown the durable, strike-throwing profile expected from a rotation mainstay, pairing steady workload with enough swing-and-miss ability to keep lineups from getting too comfortable.

His season line is supported by a solid blend of control and bat-missing skill, reflected in 8.07 strikeouts per nine and 1.94 walks per nine. When he is locating early in counts, he can move efficiently through innings and limit free passes, but stretches of harder contact can still push traffic onto the bases. Overall, the profile points to a pitcher who can stabilize a staff even when the results are not completely dominant.

Recent form:

Recent starts
  • 07/206.0 IP · 0 ER · 6 K
  • 07/086.0 IP · 2 ER · 7 K
  • 06/298.0 IP · 2 ER · 7 K
  • 06/236.0 IP · 1 ER · 5 K
  • 06/176.0 IP · 3 ER · 5 K

George Kirby has pitched to a down trend lately, though the game log still suggests he is capable of working deep when his command is sharp and his fastball is setting up the rest of the mix. If he stays ahead of hitters, the outlook remains that of a dependable starter who can rebound quickly from rough patches.

For the Seattle Mariners, his value comes from taking the ball regularly and giving the club a chance to win, whether that means suppressing damage or simply keeping the game under control long enough for the offense to respond.

George Kirby ERA trend
Last 6
Earned runs per start
Avg 1.8 ER / start
↓ ERA trending down over recent starts.

George Kirby game log

2026 season
DateOpponentIPHERKBBERA
Jul 20Cincinnati Reds630610.00
Jul 8Miami Marlins682703.00
Jun 29Los Angeles Angels872712.25
Jun 23Pittsburgh Pirates691521.50
Jun 17Baltimore Orioles683504.50
Jun 10Baltimore Orioles6731034.50
Jun 3New York Mets494519.00
May 29Arizona Diamondbacks5.164417.06
May 23Kansas City Royals693304.50
May 17San Diego Padres5.2666210.38
May 11Houston Astros571721.80
May 5Atlanta Braves752512.57
Apr 29Minnesota Twins5.282523.46
Apr 24St. Louis Cardinals652213.00
Apr 18Texas Rangers5.271521.73
Apr 13Houston Astros7.272612.50
Apr 7Texas Rangers863403.38
Apr 1New York Yankees654636.00
Mar 27Cleveland Guardians621621.50

George Kirby season splits

Home / away / vs L-R · 2026
Home ERA
ERA4.26
Away ERA
ERA3.16
vs Left AVG
AVG0.266
vs Right AVG
AVG0.293
George Kirby monthly splits
ERA · IP · K · BB · WHIP per month
MonthGSERAIPKBBWHIP
Mar11.506.0620.67
Apr63.2339.02891.21
May54.9729.02561.34
Jun53.9030.03271.57
Jul21.5012.01311.00
Pitch arsenal
Usage and average velocity · 2026
STSweeper
29.9%87.2 mph
FFFour-seam FB
29.4%96.6 mph
SISinker
20.9%96.9 mph
KCKnuckle Curve
9.6%83.9 mph
CHChangeup
7.1%88.8 mph
FCCutter
3.0%93.1 mph

Performance vs teams

2026 starts · sorted by ERA

Hot / Cold zones

Opponent results by strike zone area

AVG by zone

  • Zone 01: .273
  • Zone 02: .279
  • Zone 03: .176
  • Zone 04: .314
  • Zone 05: .365
  • Zone 06: .326
  • Zone 07: .278
  • Zone 08: .171
  • Zone 09: .382
  • Zone 11: .222
  • Zone 12: .250
  • Zone 13: .400
  • Zone 14: .177

OPS by zone

  • Zone 01: .545
  • Zone 02: .628
  • Zone 03: .471
  • Zone 04: .722
  • Zone 05: 1.048
  • Zone 06: .848
  • Zone 07: .556
  • Zone 08: .400
  • Zone 09: .941
  • Zone 11: .640
  • Zone 12: .704
  • Zone 13: 1.118
  • Zone 14: .519

SLG by zone

  • Zone 01: .273
  • Zone 02: .349
  • Zone 03: .294
  • Zone 04: .400
  • Zone 05: .683
  • Zone 06: .522
  • Zone 07: .278
  • Zone 08: .229
  • Zone 09: .559
  • Zone 11: .278
  • Zone 12: .417
  • Zone 13: .733
  • Zone 14: .242

OBP by zone

  • Zone 01: .273
  • Zone 02: .279
  • Zone 03: .176
  • Zone 04: .333
  • Zone 05: .365
  • Zone 06: .326
  • Zone 07: .278
  • Zone 08: .171
  • Zone 09: .382
  • Zone 11: .440
  • Zone 12: .333
  • Zone 13: .471
  • Zone 14: .325

earnedRunAverage by zone

  • Zone 01: -
  • Zone 02: -
  • Zone 03: -
  • Zone 04: -
  • Zone 05: -
  • Zone 06: -
  • Zone 07: -
  • Zone 08: -
  • Zone 09: -
  • Zone 11: -
  • Zone 12: -
  • Zone 13: -
  • Zone 14: -

numberOfPitches by zone

  • Zone 01: 84.00
  • Zone 02: 117.00
  • Zone 03: 96.00
  • Zone 04: 87.00
  • Zone 05: 137.00
  • Zone 06: 108.00
  • Zone 07: 52.00
  • Zone 08: 96.00
  • Zone 09: 101.00
  • Zone 11: 183.00
  • Zone 12: 185.00
  • Zone 13: 124.00
  • Zone 14: 378.00

numberOfStrikes by zone

  • Zone 01: 62.00
  • Zone 02: 82.00
  • Zone 03: 68.00
  • Zone 04: 54.00
  • Zone 05: 76.00
  • Zone 06: 64.00
  • Zone 07: 35.00
  • Zone 08: 67.00
  • Zone 09: 69.00
  • Zone 11: 43.00
  • Zone 12: 62.00
  • Zone 13: 30.00
  • Zone 14: 123.00
0.4000.3000.200
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