Jonathan Loáisiga

Active

Arizona Diamondbacks · Pitcher

Age 315' 11" · 195 lbsThrows Right

FBaseball Overview

At 31 years old, Loáisiga operates primarily as a relief pitcher for Arizona, offering modest counting stats but solid rate metrics that could make him a useful late-round bullpen option. His 2026 numbers through early season show improvement with a 2.64 ERA and 1.04 WHIP across 30+ innings, suggesting better health and command compared to last year's 4.25 ERA. The limited save opportunities (just 1 save through early May) indicate he's not closing games regularly, which caps his ceiling in that category, though his strikeout rate remains respectable at nearly 6 K/9. Fantasy managers should view him as a streaming pitcher in deeper formats who provides ERA and WHIP stability rather than a primary source of wins or saves.

MLB Pitching

Year	Team	G	GS	W	L	SV	ERA	WHIP	K	IP	BB
2018	New York Yankees	9	4	2	0	0	5.11	1.54	33	24.2	12
2019	New York Yankees	15	4	2	2	0	4.55	1.48	37	31.2	16
2020	New York Yankees	12	3	3	0	0	3.52	1.22	22	23.0	7
2021	New York Yankees	57	0	9	4	5	2.17	1.02	69	70.2	16
2022	New York Yankees	50	0	2	3	2	4.13	1.29	37	48.0	19
2023	New York Yankees	17	0	0	2	0	3.06	0.85	6	17.2	1
2024	New York Yankees	3	0	1	0	0	0.00	2.00	3	4.0	1
2025	New York Yankees	30	0	0	1	1	4.25	1.48	25	29.2	10
2026	Arizona Diamondbacks	37	0	2	2	1	2.36	1.05	22	34.1	7
Career	Totals	230	11	21	14	9	3.39	1.23	254	283.2	89

Source: MLB Stats API · Multi-team seasons show combined totals — click to expand

Minor League Pitching

Year	Team	G	GS	W	L	ERA	WHIP	K	IP	BB
2013	DSL Giants	13	13	8	1	2.75	1.11	40	68.2	16
2016	Charleston RiverDogs	1	1	0	0	7.71	1.29	2	2.1	1
2017	3 teams▼	7	7	0	1	2.30	0.77	15	15.2	2
2018	3 teams▼	14	14	6	1	2.89	1.16	67	56	8
2019	2 teams▼	6	5	0	2	5.60	1.13	22	17.2	5
2022	2 teams▼	2	1	0	0	4.50	1.50	3	2	0
2023	2 teams▼	3	0	1	0	4.50	1.00	5	4	0
2025	2 teams▼	7	1	0	0	1.08	0.60	10	8.1	1
Career	Totals	57	46	16	5	2.86	1.02	182	191.2	34

Source: MLB Stats API · Multi-team seasons show combined totals — click to expand

Game Log2026 season

Loading game log…

Pitching Analytics2026 season · via Baseball Savant

Click for year to year changes

FB Velo97.5 mph

Avg Spin2224 rpm

Whiff %22.1%

K %16.3%

BB %5.2%

Hard Hit %32.4%

Barrel %3.8%

xERA3.22

xBA Against0.241

xSLG Against0.35

BA Against0.238

SLG Against0.311

GB%53.3%

FB%19.0%

What These Stats Mean

FB Velo — Average fastball velocity. Harder throwers generate more swings and misses, setting up every other pitch in their arsenal. Velocity is the foundation of strikeout upside.

Avg Spin — Average spin rate across all pitches. Higher spin creates more movement and makes pitches harder to square up — elite spinners run better strikeout and batting average against numbers.

Whiff % — Swings-and-misses per swing. The most direct measure of a pitcher's ability to miss bats and the best leading indicator of strikeout rate.

K % — Strikeout rate per batter faced. The core fantasy pitching stat — high K% means reliable strikeout totals that hold up even in shorter starts.

BB % — Walk rate per batter faced. The primary control metric. High BB% tanks ERA and WHIP and keeps baserunners on constantly. Elite starters typically run below 7%.

Hard Hit % — Percentage of batted balls hit 95 mph or harder against. Low hard-hit% means weak contact, protecting both ERA and the defense behind the pitcher.

Barrel % — Percentage of batted balls barreled against. The most direct home run predictor — low barrel% pitchers rarely give up long balls.

xERA — Expected ERA based on contact quality allowed, removing the effect of sequencing, luck, and defense. Better predictor of future ERA than ERA itself.

xBA Against — Expected batting average opponents should hit based on contact quality. A gap between xBA and actual BA indicates unsustainable luck in either direction.

xSLG Against — Expected slugging allowed based on contact quality. High xSLG against predicts future extra-base damage; low xSLG means the pitcher is genuinely suppressing power.

BA Against — Actual batting average opponents are hitting — a key WHIP component. Check xBA to see if the number is sustainable.

SLG Against — Actual slugging allowed. Captures hits, doubles, triples, and home runs — lower means the pitcher is limiting the power damage he gives up.

GB% — Ground ball rate. High GB% pitchers generate double plays, limit home runs, and keep the ball in the park — great for protecting ERA and WHIP ratios.

FB% — Fly ball rate. High FB% pitchers give up more air contact — dangerous when combined with high exit velocity, less so when contact is soft.

Loading player data...

Year

Team

ERA

WHIP

2018

New York Yankees

5.11

1.54

24.2

2019

New York Yankees

4.55

1.48

31.2

2020

New York Yankees

3.52

1.22

23.0

2021

New York Yankees

2.17

1.02

70.2

2022

New York Yankees

4.13

1.29

48.0

2023

New York Yankees

3.06

0.85

17.2

2024

New York Yankees

0.00

2.00

4.0

2025

New York Yankees

4.25

1.48

29.2

2026

Arizona Diamondbacks

2.36

1.05

34.1

Career

Totals

230

3.39

1.23

254

283.2

Year

Team

ERA

WHIP

2013

DSL Giants

2.75

1.11

68.2

2016

Charleston RiverDogs

7.71

1.29

2.1

2017

3 teams▼

2.30

0.77

15.2

2018

3 teams▼

2.89

1.16

2019

2 teams▼

5.60

1.13

17.2

2022

2 teams▼

4.50

1.50

2023

2 teams▼

4.50

1.00

2025

2 teams▼

1.08

0.60

8.1

Career

Totals

2.86

1.02

182

191.2