Players · L · Pitcher · 2026 regular season

Jonathan Loáisiga

Arizona Diamondbacks National League West

Age: 32
B/T: R/R
Height: 5' 11"
Weight: 195 lb
Number: #43

Born: November 2, 1994 in Managua, Nicaragua
MLB debut: June 15, 2018
Salary, 2026: $5M

Compare with…vs Yennier Cano vs Brennan Bernardino vs Kevin Kelly

dbWAR: 4.1
IP: 67.0
ERA: 2.42
FIP: 2.88
K/9: 6.4
FIP−: 69

Jonathan Loáisiga is a relief pitcher for the Arizona Diamondbacks. In 2026 he struck out 48 batters over 67.0 innings across 67 appearances, going 7-3. His ERA of 2.42 was 42.2% lower than the league average of 4.18 — the third best on his team, and 40th of 539 among MLB pitchers with 20+ innings. Stripping out defence, his 2.88 FIP suggests that his ERA had some help behind him. He missed bats on 23.1% of swings (12.2% of every pitch he threw), walked 5.0% of the batters he faced and struck out 18.4%. 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.

FIP2.88

K/96.4

WHIP1.03

WAR1.4

WAR by season

Pitching Regular season

Standard and advanced, by season. Regular-season games only — postseason games are listed separately below.


2026	AZ	67	0	67.0	7	3	2	56	18	48	13	2.42	2.88	1.03	6.4	1.7	58	69	1.4
2025	NYY	30	0	29.2	0	1	1	34	14	25	10	4.25	5.83	1.48	7.6	3.0	102	140	-0.4
2024	NYY	3	0	4.0	1	0	0	7	0	3	1	0.00	2.42	2.00	6.8	2.3	0	59	0.1
2023	NYY	17	0	17.2	0	2	0	14	6	6	1	3.06	4.56	0.85	3.1	0.5	71	105	0.1
2022	NYY	50	0	48.0	2	3	2	43	22	37	19	4.13	3.57	1.29	6.9	3.6	104	90	0.5
2021	NYY	57	0	70.2	9	4	5	56	17	69	16	2.17	2.58	1.02	8.8	2.0	51	60	1.8
2020	NYY	12	3	23.0	3	0	0	21	9	22	7	3.52	4.41	1.22	8.6	2.7	79	99	0.2
2019	NYY	15	4	31.2	2	2	0	31	16	37	16	4.55	4.95	1.48	10.5	4.5	101	110	0.0
2018	NYY	9	4	24.2	2	0	0	26	14	33	12	5.11	3.53	1.54	12.0	4.4	123	85	0.4

Batting Regular season

Standard and advanced, by season. Regular-season games only — postseason games are listed separately below.

																					Trend
2018	NYY	1	2	0	0	0	0	0	2	.000	.000	.000	.000	—	0.0%	100.0%	.000	-0.5	-116	-0.0	—

Separate from the regular season

Postseason Postseason

Wild Card through World Series. These games are counted on their own: none of them are in the regular-season tables, career totals, league context, leaderboards or dbWAR on this page.

Postseason pitching

Postseason Jonathan Loáisiga's postseason pitching, by October and round. Not part of any regular-season figure on this page.
Season	Team	Round	G	IP	L	H	ER	HR	BB	SO	ERA	WHIP	K/9
2022 Post	NYY	Postseason total	6	9.1	1	9	1	0	1	4	0.96	1.07	3.9
		ALDS	4	5.0	0	6	0	0	0	3	0.00	1.20	5.4
		ALCS	2	4.1	1	3	1	0	1	1	2.08	0.92	2.1
2021 Post	NYY	Wild Card	1	1.0	0	0	2	0	3	2	18.00	3.00	18.0
2020 Post	NYY	Postseason total	2	2.0	0	3	2	1	2	1	9.00	2.50	4.5
		Wild Card	1	0.1	0	1	1	0	2	0	27.00	9.00	0.0
		ALDS	1	1.2	0	2	1	1	0	1	5.40	1.20	5.4
2019 Post	NYY	Postseason total	4	2.2	0	3	1	0	3	3	3.38	2.25	10.1
		ALDS	1	1.0	0	2	1	0	0	2	9.00	2.00	18.0
		ALCS	3	1.2	0	1	0	0	3	1	0.00	2.40	5.4
Career		Postseason total · 4 Octobers	13	15.0	1	15	6	1	9	10	3.60	1.60	6.0

Box-score and rate statistics only. wOBA, wRC+, FIP and dbWAR are measured against a full league season, and a postseason is a few teams playing each other for a month, so they are not computed for October.

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	133	119	34	2	10	24	.286	.336	.437	.329	18.0%
vs RHB	128	123	22	1	3	24	.179	.203	.211	.188	18.8%

Pitch sequencing

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

ShowBatter

SinkerChangeupFour-seamCurveballCutter

Select a count to see exactly what Jonathan Loáisiga throws in it.

Pitch arsenal

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

Season


Sinker	35.1%	338	97.9	2,301	53.6%	16.9%	91	.242	.563
Changeup	27.1%	261	91.0	1,775	39.8%	31.8%	82	.244	.659
Four-Seam Fastball	17.0%	164	97.5	2,397	50.6%	19.0%	27	.148	.392
Curveball	14.8%	142	89.5	2,645	35.9%	25.8%	30	.233	.617
Cutter	5.9%	57	95.7	2,452	49.1%	24.1%	12	—	—

Jonathan Loáisiga'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.

Yennier CanoBAL

ERA: 2.90
FIP: 2.78
SO: 45
WAR: 1.1

Very close

Brennan BernardinoCOL

ERA: 2.81
FIP: 3.53
SO: 49
WAR: 1.0

Kevin KellyTB

ERA: 2.44
FIP: 3.02
SO: 63
WAR: 1.4

Spencer MilesTOR

ERA: 2.63
FIP: 2.65
SO: 93
WAR: 2.4

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.