Jhonathan Diaz (RP) - Seattle Mariners MLB Stats 2020

Updated Oct 28, 2026 10:52 PM ET

Jhonathan Diaz

· RP · MLB · 8,168 views

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

FPPG (DK, 2020)

—

ERA

27.00

W-L

0-0

0.2

2020 Season Stats

Jhonathan posted a 27.0 ERA over 0.2 innings pitched in 2020. He had struck out 2 batters and walked 1 and averaging 27.0 strikeouts per nine innings. His WHIP stood at 6.0, allowing 3 hits and 1 home run.

Pitching Splits Pitching performance splits against left-handed and right-handed batters.

Split	K%	K/9	BB%	wOBA	xFIP	HH%
vs LHB	15.4%	5.9	7.2%	0.401	4.87	33.3%
vs RHB	13.1%	6.5	11.5%	0.456	6.34	34.3%
Overall	17.2%	7.3	5.2%	0.397	4.49	33.5%

Pitching Splits — K% & BB% (2020) Strikeout and walk rates against left-handed batters, right-handed batters, and overall.

Pitching Splits — wOBA (2020) Weighted on-base average allowed against left-handed batters, right-handed batters, and overall. Lower is better for pitchers.

Pitching Splits — HH% (2020) 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.

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SIERA

4.65

P/IP

19.0

TBF

HH%

33.5%

Barrel%

4.3%

CSW%

32.0%

CSW Prev

19.2%

GB%

66.7%

FB%

33.3%

Bullpen

4.24

RSB

0.00

Batted Ball Profile (2020) 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. 2020 Season

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Jhonathan Diaz MLB Stats 2020

Jhonathan Diaz is a RP for the Seattle Mariners. For the 2026 season, Jhonathan had a 17.2% strikeout rate, a 4.49 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.