Players · R · Pitcher · 2026

Joe Rock

Chicago White Sox American League Central

Age: 26
B/T: L/L
Height: 6' 6"
Weight: 220 lb
Number: #30

Born: July 29, 2000 in Sewickley, PA, United States
MLB debut: June 28, 2025
Drafted: 2021, round CB-B
College: Ohio

dbWAR: .0
IP: 10.1
ERA: 5.23
FIP: 5.13
K/9: 10.5
FIP−: 123

Joe Rock is a relief pitcher for the Chicago White Sox. In 2026 he struck out 12 batters over 10.1 innings across 5 appearances, going 0-1. His ERA of 5.23 is 25.1% higher than the league average of 4.18. Stripping out defence, his 5.13 FIP suggests the ERA was no fluke. He missed bats on 27.0% of swings (11.4% of every pitch he threw), walked 23.2% of the batters he faced and struck out 21.4%. His -0.1 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.

League context

Percentile among qualified pitchers, 2026.

FIP5.13

K/910.5

WHIP2.42

WAR-.1

WAR by season

Pitching

Standard and advanced, by season.

																				Trend
2026	CWS/ATH	5	0	10.1	0	1	0	12	6	12	13	5.23	5.13	2.42	10.5	11.3	125	123	-0.1
2025	TB	3	0	7.2	0	0	0	7	2	11	2	2.35	3.53	1.17	12.9	2.3	56	85	0.1

Platoon splits

How left- and right-handed hitters fare against him.

Season

Opponent batting by the side the hitter bats from, 2026. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
Split	PA	AB	H	HR	BB	SO	AVG	OBP	SLG	wOBA	K%
vs LHB	32	21	6	0	9	6	.286	.531	.286	.418	18.8%
vs RHB	24	20	6	0	4	6	.300	.417	.350	.359	25.0%

Pitch sequencing

What Joe Rock throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter

Four-seamSliderSinkerChangeup

Select a count to see exactly what Joe Rock throws in it.

Pitch arsenal

What he throws, how hard, how often it misses, and what hitters do with it.

Season


Four-Seam Fastball	49.3%	104	93.4	2,332	47.1%	25.6%	12	—	—
Slider	37.4%	79	84.9	2,536	46.8%	34.1%	24	.292	.705
Sinker	10.0%	21	93.7	2,390	38.1%	0.0%	4	—	—

Joe Rock's arsenal by usage. Velocity is average release speed in mph, spin in rpm, and whiff rate is misses per swing — the cleanest single measure of whether a pitch beats hitters. BAA and OPS are what hitters did against each pitch, credited to the one that ended the plate appearance, and are left blank under 15 at-bats.

Head to head

Put Joe Rock beside up to three others.

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Joe Rock

How these are computed

wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.