Players · W · Pitcher · 2026

Ken Waldichuk

Washington Nationals National League East

Age: 28
B/T: L/L
Height: 6' 4"
Weight: 220 lb
Number: #52

Born: January 8, 1998 in San Diego, CA, United States
MLB debut: September 1, 2022
Drafted: 2019, round 5
College: St. Mary's
Salary, 2026: $825,000

dbWAR: -.4
IP: 9.1
ERA: 6.75
FIP: 9.21
K/9: 7.7
FIP−: 220

Ken Waldichuk is a relief pitcher for the Washington Nationals. In 2026 he struck out 8 batters over 9.1 innings across 5 appearances, going 0-0. His ERA of 6.75 is 61.6% higher than the league average of 4.18. Stripping out defence, his 9.21 FIP suggests that his ERA had some help behind him. He missed bats on 27.4% of swings (11.6% of every pitch he threw), walked 14.6% of the batters he faced and struck out 19.5%. His -0.5 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.

FIP9.21

K/97.7

WHIP1.50

WAR-.5

WAR by season

Pitching

Standard and advanced, by season.


2026	WSH	5	0	9.1	0	0	0	8	7	8	6	6.75	9.21	1.50	7.7	5.8	162	220	-0.5
2023	OAK	35	22	141.0	4	9	1	149	84	132	71	5.36	5.30	1.56	8.4	4.5	124	122	-0.2
2022	OAK	7	7	34.2	2	2	0	32	19	33	10	4.93	4.30	1.21	8.6	2.6	124	108	0.3

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	19	17	4	1	1	3	.235	.316	.412	.325	15.8%
vs RHB	21	17	4	3	4	5	.235	.381	.765	.470	23.8%

Pitch sequencing

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

ShowBatter

CurveballFour-seamCutterSweeper

Select a count to see exactly what Ken Waldichuk throws in it.

Pitch arsenal

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

Season


Curveball	41.5%	61	81.5	2,331	45.9%	39.3%	16	.188	.610
Four-Seam Fastball	32.7%	48	93.2	2,409	31.3%	5.9%	11	—	—
Cutter	17.7%	26	87.7	2,329	57.7%	28.6%	4	—	—
Sweeper	6.8%	10	84.9	2,291	40.0%	33.3%	3	—	—

Ken Waldichuk'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 Ken Waldichuk beside up to three others.

Compare — add up to 3 more players

Ken Waldichuk

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.