Players · R · Pitcher · 2026

Ryan Rolison

Age: 29
B/T: R/L
Height: 6' 2"
Weight: 213 lb
Number: #33

Born: July 11, 1997 in Jackson, TN, United States
MLB debut: May 13, 2025
Drafted: 2018, round 1
College: Mississippi
High school: University

dbWAR: -.3
IP: 63.0
ERA: 3.14
FIP: 3.93
K/9: 7.9
FIP−: 94

Ryan Rolison is a relief pitcher for the Chicago Cubs. In 2026 he struck out 55 batters over 63.0 innings across 60 appearances, going 9-2. His ERA of 3.14 is 24.8% lower than the league average of 4.18 — the second best on his team, and 113th of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 3.93 FIP suggests that his ERA had some help behind him. He missed bats on 19.7% of swings (9.0% of every pitch he threw), walked 10.9% of the batters he faced and struck out 21.5%. His 0.6 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.

FIP3.93

K/97.9

WHIP1.29

WAR.6

WAR by season

Pitching

Standard and advanced, by season.

																				Trend
2026	CHC	60	2	63.0	9	2	3	53	22	55	28	3.14	3.93	1.29	7.9	4.0	75	94	0.6
2025	COL	31	1	42.1	1	0	0	55	33	25	20	7.02	6.75	1.77	5.3	4.3	169	162	-0.9

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	123	111	18	0	10	32	.162	.230	.189	.200	26.0%
vs RHB	133	115	35	6	18	23	.304	.398	.530	.404	17.3%

Pitch sequencing

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

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Four-seamCurveballSweeperSinkerSliderUnknownChangeup

Select a count to see exactly what Ryan Rolison throws in it.

Pitch arsenal

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

Season


Four-Seam Fastball	39.3%	394	94.7	2,270	44.2%	13.7%	95	.221	.732
Curveball	16.2%	162	79.5	2,668	47.5%	22.9%	32	.344	1.039
Sweeper	15.2%	152	85.1	2,603	44.1%	35.9%	37	.108	.240
Sinker	14.7%	147	95.0	2,209	49.7%	17.1%	29	.138	.366
Slider	12.6%	126	86.8	2,530	42.1%	16.9%	33	.333	.783
Unknown	1.3%	13	—	—	46.2%	14.3%	2	—	—

Ryan Rolison'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

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Similar players

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

Tim HerrinCLE

ERA: 3.02
FIP: 4.09
SO: 54
WAR: 0.4

Very close

Chad PatrickMIL

ERA: 3.07
FIP: 3.99
SO: 93
WAR: 1.0

Very close

Mason FluhartyTOR

ERA: 3.36
FIP: 3.67
SO: 65
WAR: 0.8

Very close

Brooks RaleyNYM

ERA: 3.31
FIP: 3.97
SO: 51
WAR: 0.4

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.