Players · R · Pitcher · 2026 regular season

Kumar Rocker

Age: 27
B/T: R/R
Height: 6' 5"
Weight: 245 lb
Number: #80

Born: November 22, 1999 in Watkinsville, GA, United States
MLB debut: September 12, 2024
Drafted: 2022, round 1
College: Vanderbilt
High school: North Oconee

Compare with…vs Walker Buehler vs Freddy Peralta vs David Peterson

dbWAR: 1.7
IP: 148.0
ERA: 4.38
FIP: 4.31
K/9: 8.4
FIP−: 103

Kumar Rocker is a starting pitcher for the Texas Rangers. In 2026 he struck out 138 batters over 148.0 innings across 30 appearances, 27 of them starts, going 6-11. His ERA of 4.38 was 4.7% higher than the league average of 4.18 — 11th of 16 on his team, and 325th of 539 among MLB pitchers with 20+ innings. Stripping out defence, his 4.31 FIP suggests the ERA was no fluke. He missed bats on 26.1% of swings (12.5% of every pitch he threw), walked 9.5% of the batters he faced and struck out 21.4%. His 1.4 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 regular season.

FIP4.31

K/98.4

WHIP1.41

WAR1.4

WAR by season

Pitching Regular season

Standard and advanced, by season. Regular-season games only.


2026	TEX	30	27	148.0	6	11	147	72	138	61	4.38	4.31	1.41	8.4	3.7	105	103	1.4
2025	TEX	14	14	64.1	4	5	71	41	56	23	5.74	4.88	1.46	7.8	3.2	138	117	0.2
2024	TEX	3	3	11.2	0	2	12	5	14	6	3.86	3.68	1.54	10.8	4.6	95	90	0.2

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	367	327	90	14	38	75	.275	.349	.471	.358	20.4%
vs RHB	278	249	57	6	23	63	.229	.302	.365	.299	22.7%

Pitch sequencing

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

ShowBatter

SliderSinkerFour-seamCutterChangeupSplitter

Select a count to see exactly what Kumar Rocker throws in it.

Pitch arsenal

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

Season


Slider	37.7%	940	83.1	2,187	47.7%	42.5%	224	.201	.567
Sinker	29.5%	737	94.3	2,141	40.8%	9.2%	190	.300	.864
Four-Seam Fastball	14.7%	367	94.5	2,153	43.6%	22.5%	77	.221	.700
Cutter	14.1%	351	90.2	2,158	45.9%	21.1%	68	.338	1.035
Changeup	3.2%	81	88.7	1,635	34.6%	24.3%	17	.235	.634
Splitter	0.8%	20	88.0	1,602	30.0%	28.6%	2	—	—

Kumar Rocker'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.

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Similar players

Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.

Freddy PeraltaNYM

ERA: 4.42
FIP: 4.29
SO: 156
WAR: 1.8

Very close

Kyle BradishBAL

ERA: 4.12
FIP: 4.36
SO: 142
WAR: 1.5

Very close

Walker BuehlerSD

ERA: 4.63
FIP: 4.51
SO: 131
WAR: 1.2

Very close

Brandon YoungBAL

ERA: 3.56
FIP: 4.48
SO: 133
WAR: 1.3

Very close

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.