Players · K · Pitcher · 2023

James Kaprielian

Age: 29
B/T: R/R
Height: 6' 3"
Weight: 225 lb

Born: March 2, 1994 in Laguna Hills, CA, United States
MLB debut: August 16, 2020

dbWAR: 1.7
IP: 61.0
ERA: 6.34
FIP: 5.07
K/9: 8.4
FIP−: 117

James Kaprielian was a starting pitcher for the Oakland Athletics. In 2023 he struck out 57 batters over 61.0 innings across 14 appearances, 11 of them starts, going 2-6. His ERA of 6.34 was 46.5% higher than the league average of 4.33 — 14th of 18 on his team, and 497th of 550 among MLB pitchers with 20+ innings. Stripping out defence, his 5.07 FIP suggests he pitched better than his ERA shows. He missed bats on 25.0% of swings (12.1% of every pitch he threw), walked 11.1% of the batters he faced and struck out 20.4%. 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, 2023.

FIP5.07

K/98.4

WHIP1.59

WAR.1

WAR by season

Pitching

Standard and advanced, by season.


2023	OAK	14	11	61.0	2	6	66	43	57	31	6.34	5.07	1.59	8.4	4.6	146	117	0.1
2022	OAK	26	26	134.0	5	9	121	63	98	59	4.23	4.63	1.34	6.6	4.0	107	117	0.5
2021	OAK	24	21	119.1	8	5	105	54	123	41	4.07	4.33	1.22	9.3	3.1	95	102	1.2
2020	OAK	2	0	3.2	0	0	4	3	4	2	7.36	9.74	1.64	9.8	4.9	165	219	-0.2

Batting

Standard and advanced, by season.

																					Trend
2021	OAK	2	4	1	0	0	0	0	2	.333	.333	.333	.000	1.000	0.0%	50.0%	.292	-0.1	86	0.1	—

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2023. 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	128	109	30	6	15	22	.275	.373	.505	.377	17.2%
vs RHB	152	132	36	3	16	35	.273	.362	.409	.342	23.0%

Pitch sequencing

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

ShowBatter

Four-seamSliderSinkerChangeupCurveball

Select a count to see exactly what James Kaprielian throws in it.

Pitch arsenal

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

Season


Four-Seam Fastball	41.3%	451	92.3	2,000	47.7%	25.2%	100	.200	.711
Slider	30.2%	330	80.8	2,350	49.7%	30.8%	79	.266	.731
Sinker	14.1%	154	91.9	1,896	42.2%	14.1%	35	.400	1.026
Changeup	8.0%	87	83.2	1,310	49.4%	20.0%	19	.368	1.105
Curveball	6.1%	67	75.9	2,433	55.2%	23.5%	9	—	—

James Kaprielian'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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James Kaprielian

Similar players

Nearest 2023 seasons by command, run prevention and role, on rate statistics rather than totals.

Joan AdonWSH

ERA: 6.45
FIP: 4.98
SO: 48
WAR: 0.2

Very close

Roansy ContrerasPIT

ERA: 6.59
FIP: 5.19
SO: 55
WAR: 0.0

Very close

Luis MedinaOAK

ERA: 5.42
FIP: 4.76
SO: 106
WAR: 0.6

Very close

Ken WaldichukOAK

ERA: 5.36
FIP: 5.30
SO: 132
WAR: -0.2

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.