Seattle Mariners#68 · SP
George Kirby
Age 28
Contract Value $6,550,000/yr
Size 6' 4" · 215
Throws RHP
Bats Right
From Rye, NY
9–11
W-L
4.18
ERA
1.34
WHIP
133
K
159.1
IP
27
GS
59P-ScoreAVERAGE
Kirby combines strong consistency with above avg run prevention. He ranks 91st among 224 qualified starters.
How P-Score works →Stats updated Sep 7, 11:37 AM ETLast game Sep 5 vs ATH
Season overview
How good is he?
StatPlayerMLB AvgPercentile
Results6350ABOVE AVG
Strikeouts & Control4950BELOW AVG
Run Prevention6450ABOVE AVG
Consistency7550STRONG
Form3650WEAK
Recent form
Last 5 startsPitch arsenal (2026)
Usage %Velocity
- Four-seam FB28.8%96.7 mph
- Sweeper28.2%87.3 mph
- Sinker20.4%96.8 mph
- Knuckle Curve10.6%84.1 mph
- Changeup5.7%88.8 mph
- Cutter4.2%92.9 mph
- Splitter2.2%87.2 mph
Hot / cold zones (vs RHB)
.250.328.174.314.369.344.320.260.396
- Better than MLB avg
- Similar to MLB avg
- Worse than MLB avg
Monthly ERA (2026)
Minimum 1 GSSplits
Home / away
Home (15 GS)
3.27
WHIP 1.14
Away (12 GS)
5.48
WHIP 1.63
2.21 ERA better at home
vs handedness
vs LHH
.782
vs RHH
.759
.023 OPS better vs RHH
By monthERA · IP · K
September4.056.25
August4.9632.221
July5.0616.016
June3.9030.032
May4.9729.025
April3.2339.028
March1.506.06
Rest daysERA · WHIP · K/9
5 days (6 GS)3.791.468.8
6+ days (20 GS)4.441.347.0
Sample sizes below four starts are not shown
Career
Frequently asked
What is George Kirby's ERA in 2026?+
4.18 across 27 starts and 159.1 innings, with a 1.34 WHIP and a 3.81 FIP. That ERA ranks 118th among qualified starters.
When is his next start?+
No probable start has been announced.
What pitches does he throw?+
He throws four-seam fb (28.8% at 96.7 mph mph), sweeper (28.2% at 87.3 mph mph), sinker (20.4% at 96.8 mph mph), knuckle curve (10.6% at 84.1 mph mph), changeup (5.7% at 88.8 mph mph), cutter (4.2% at 92.9 mph mph), splitter (2.2% at 87.2 mph mph).
What is his P-Score?+
59 out of 100, which we label average — 91st among 224 qualified starters.
How has he pitched in his last 5 starts?+
A 6.59 ERA, 6.9 K/9, 3.0 BB/9.