Jhonathan Diaz (RP) - Seattle Mariners MLB Stats 2025

Updated Oct 28, 2026 10:52 PM ET

Jhonathan Diaz

· RP · MLB · 8,169 views

30 yrs · 6' 0" · 170 lbs · Bats: Left / Throws: Left · Debut: 2021

FPPG (DK, 2025)

—

ERA

9.00

W-L

0-3

8.0

2025 Season Stats

Jhonathan posted a 9.0 ERA over 8.0 innings pitched with a 0-3 record in 2025. He had struck out 8 batters and walked 2 and averaging 9.0 strikeouts per nine innings. His WHIP stood at 2.13, allowing 15 hits and 1 home run.

Pitching Splits Pitching performance splits against left-handed and right-handed batters. 2025 Season - 5 TBF

Split	K%	K/9	BB%	wOBA	xFIP	HH%
vs LHB	0.0%	0.0	0.0%	0.500	7.00	25.0%
vs RHB	33.3%	9.0	0.0%	0.000	4.22	25.0%
Overall	20.0%	6.8	0.0%	0.230	3.95	25.0%

Pitching Splits — K% & BB% (2025) Strikeout and walk rates against left-handed batters, right-handed batters, and overall.

Pitching Splits — wOBA (2025) Weighted on-base average allowed against left-handed batters, right-handed batters, and overall. Lower is better for pitchers.

Pitching Splits — HH% (2025) Hard-hit rate allowed against left-handed batters, right-handed batters, and overall. Lower is better for pitchers.

Season Context Key season-level pitching metrics including games played, SIERA, and batted ball data. 2025 Season - 5 TBF

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SIERA

6.36

P/IP

23.6

TBF

HH%

25.0%

Barrel%

0.0%

CSW%

32.0%

CSW Prev

19.2%

GB%

66.7%

FB%

33.3%

Bullpen

4.24

RSB

0.00

Batted Ball Profile (2025) Ground ball vs fly ball tendency — higher GB% generally means fewer home runs allowed.

Traditional Stats Standard pitching stats: ERA, FIP, W/L, saves, holds, innings, and games started. 2025 Season

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Jhonathan Diaz MLB Stats 2025

Jhonathan Diaz is a RP for the Seattle Mariners. For the 2026 season, Jhonathan had a 20.0% strikeout rate, a 3.95 xFIP, a 6.75 ERA, 1.1 innings pitched. View Jhonathan's 2026 stats, recent performance trends, and key statistical categories to evaluate fantasy value and make informed DFS lineup decisions.

Stats updated November 4, 2026.