⚾ Data Hub

George Kirby

Seattle Mariners · RP

Throws: R

Age: 28

Ht: 6'4"

Wt: 215 lbs

5-7

W-L

4.10

ERA

21.1%

K%

5.6%

BB%

.298

xwOBA

.380

xSLG

25.7%

CSW%

41.8%

HH%

Season-by-Season Statistics

Overview						Rate			Expected			Batted Ball
Year	G	GS	W-L	IP	ERA	SO	K%	BB%	xAVG	xwOBA	xSLG	HH%	GB%	FB%	LD%
2026	15		5-7	90.0	4.10	79	21.1%	5.6%	.254	.298	.380	41.8%	50.5%	24.5%	19.4%
2025	23	23	10-8	126.0	4.21	137	26.1%	5.5%	.252	.305	.392	33.9%	44.1%	33.5%	22.3%
2024	33	33	14-11	191.0	3.53	179	23.0%	3.0%	.235	.287	.395	29.4%	41.3%	40.7%	18.0%
2023	31	31	13-10	190.2	3.35	172	22.7%	2.5%	.262	.305	.425	32.7%	44.2%	37.0%	18.9%
2022	25	25	8-5	130.0	3.39	133	24.5%	4.1%	.232	.284	.379	31.4%	45.5%	38.1%	16.4%

2026 Pitch Arsenal

4-Seamer 435 thrown

Usage31.3%

K%19.3%

Whiff%21.6%

Putaway%16.0%

xwOBA.319

xSLG.432

Hard Hit%41.6%

Sweeper 393 thrown

Usage28.3%

K%29.1%

Whiff%26.0%

Putaway%21.9%

xwOBA.237

xSLG.286

Hard Hit%28.8%

Sinker 284 thrown

Usage20.4%

K%22.1%

Whiff%14.1%

Putaway%22.4%

xwOBA.318

xSLG.400

Hard Hit%56.4%

Curveball 139 thrown

Usage10.0%

K%9.7%

Whiff%18.5%

Putaway%10.0%

xwOBA.298

xSLG.356

Hard Hit%48.1%

Changeup 94 thrown

Usage6.8%

K%16.7%

Whiff%25.6%

Putaway%19.0%

xwOBA.385

xSLG.534

Hard Hit%47.1%

Cutter 46 thrown

Usage3.3%

K%0.0%

Whiff%17.4%

Putaway%0.0%

xwOBA.343

xSLG.376

Hard Hit%33.3%

2025 Pitch Arsenal

4-Seamer 601 thrown

Usage28.8%

K%33.3%

Whiff%30.7%

Putaway%23.3%

xwOBA.293

xSLG.370

Hard Hit%42.5%

Slider 587 thrown

Usage28.1%

K%25.4%

Whiff%30.9%

Putaway%17.9%

xwOBA.281

xSLG.386

Hard Hit%44.2%

Sinker 559 thrown

Usage26.8%

K%17.0%

Whiff%11.5%

Putaway%22.0%

xwOBA.358

xSLG.449

Hard Hit%42.6%

Curveball 237 thrown

Usage11.4%

K%34.4%

Whiff%39.7%

Putaway%19.8%

xwOBA.247

xSLG.329

Hard Hit%48.7%

2024 Pitch Arsenal

4-Seamer 1,006 thrown

Usage33.9%

K%30.7%

Whiff%29.1%

Putaway%21.2%

xwOBA.293

xSLG.439

Hard Hit%36.8%

Sinker 703 thrown

Usage23.7%

K%12.0%

Whiff%10.5%

Putaway%13.5%

xwOBA.296

xSLG.381

Hard Hit%39.7%

Slider 702 thrown

Usage23.7%

K%22.8%

Whiff%27.1%

Putaway%22.6%

xwOBA.287

xSLG.387

Hard Hit%32.5%

Split-Finger 301 thrown

Usage10.1%

K%24.7%

Whiff%29.0%

Putaway%14.8%

xwOBA.284

xSLG.369

Hard Hit%33.3%

Curveball 242 thrown

Usage8.2%

K%24.1%

Whiff%28.8%

Putaway%12.6%

xwOBA.257

xSLG.322

Hard Hit%35.7%

2023 Pitch Arsenal

4-Seamer 1,123 thrown

Usage39.8%

K%28.3%

Whiff%27.8%

Putaway%21.6%

xwOBA.310

xSLG.439

Hard Hit%44.3%

Sinker 598 thrown

Usage21.2%

K%18.2%

Whiff%13.1%

Putaway%17.5%

xwOBA.313

xSLG.407

Hard Hit%38.9%

Slider 556 thrown

Usage19.7%

K%12.7%

Whiff%22.0%

Putaway%9.8%

xwOBA.286

xSLG.367

Hard Hit%28.0%

Curveball 324 thrown

Usage11.5%

K%17.9%

Whiff%15.9%

Putaway%17.4%

xwOBA.315

xSLG.497

Hard Hit%47.8%

Split-Finger 171 thrown

Usage6.1%

K%40.8%

Whiff%35.7%

Putaway%23.3%

xwOBA.208

xSLG.314

Hard Hit%51.7%

2022 Pitch Arsenal

4-Seamer 956 thrown

Usage45.7%

K%30.6%

Whiff%26.6%

Putaway%22.8%

xwOBA.268

xSLG.377

Hard Hit%43.4%

Curveball 278 thrown

Usage13.3%

K%10.9%

Whiff%13.8%

Putaway%14.0%

xwOBA.370

xSLG.503

Hard Hit%34.0%

Cutter 255 thrown

Usage12.2%

K%23.3%

Whiff%21.5%

Putaway%14.3%

xwOBA.314

xSLG.432

Hard Hit%40.9%

Sinker 249 thrown

Usage11.9%

K%27.4%

Whiff%10.5%

Putaway%24.5%

xwOBA.256

xSLG.258

Hard Hit%25.5%

Slider 187 thrown

Usage8.9%

K%18.8%

Whiff%13.8%

Putaway%12.3%

xwOBA.219

xSLG.262

Hard Hit%34.2%

Changeup 167 thrown

Usage8.0%

K%13.6%

Whiff%15.8%

Putaway%13.0%

xwOBA.336

xSLG.485

Hard Hit%45.9%

Platoon Splits - 2026

Split	PA	xAVG	xwOBA	xSLG	K%	BB%	HR
vs LHB	198	.247	.297	.355	18.2%	8.1%	5
vs RHB	177	.261	.301	.406	24.3%	2.8%	4
Home	60	.266	.323	.425	48.0%	13.0%	1
Road	40	.292	.314	.375	31.0%	8.0%	0

Recent Game Logs - 2026

Game			Pitching								Vegas			Weather		DFS
Date	Opp	Dec	IP	H	ER	BB	SO	Pit	BF	CSW%	ML	O/U	TT	Tmp	Wind	DKFP
Jun 17	vs BAL	L	6.0	8	3	0	5	92	25	5.4%	-149	7.5	4.3	-	-	12.7
Jun 10	@ BAL	L	6.0	7	3	3	10	104	27	9.6%	-125	9.0	4.8	-	-	21.5
Jun 3	vs NYM	L	4.0	9	4	1	5	89	23	5.6%	-149	7.0	4.0	-	-	5.0
May 29	vs ARI	-	5.1	6	4	1	4	87	22	4.6%	-144	7.0	3.9	-	-	7.8
May 23	@ KC	L	6.0	9	3	0	3	92	27	3.3%	-126	8.5	4.5	-	-	8.1
May 17	vs SD	L	5.2	6	6	2	6	98	24	6.1%	-157	7.5	4.4	-	-	8.0
May 11	@ HOU	W	5.0	7	1	2	7	99	23	7.1%	-156	8.5	5.0	-	-	21.9
May 5	vs ATL	-	7.0	5	2	1	5	88	26	5.7%	-136	8.0	4.4	-	-	18.2
Apr 29	@ MIN	-	5.2	8	2	2	5	97	25	5.2%	-136	8.0	4.4	-	-	12.8
Apr 24	@ STL	W	6.0	5	2	1	2	81	24	2.5%	-149	8.0	4.6	-	-	13.3
Apr 18	vs TEX	W	5.2	7	1	2	5	96	26	5.2%	-136	7.0	3.9	-	-	19.4
Apr 13	vs HOU	W	7.2	7	2	1	6	99	29	6.1%	-181	8.0	4.9	-	-	24.5
Apr 7	@ TEX	L	8.0	6	3	0	4	90	28	4.4%	-118	8.0	4.1	-	-	18.9
Apr 1	vs NYY	L	6.0	5	4	3	6	89	24	6.7%	-120	7.0	3.7	-	-	12.7
Mar 27	vs CLE	W	6.0	2	1	2	6	90	22	6.7%	-175	7.0	4.3	-	-	24.5