James Paxton (SP) - Seattle Mariners MLB Stats 2021

Updated May 12, 2026 6:11 PM ET

James Paxton

· SP · MLB · 3,372 views

37 yrs · 6' 4" · 212 lbs · Kentucky · 2010: Rd 4, Pk 132 (SEA) · Bats: Left / Throws: Left · Debut: 2013

FPPG (DK, 2021)

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ERA

6.75

W-L

0-0

1.1

2021 Season Stats

James posted a 6.75 ERA over 1.1 innings pitched in 2021. He had struck out 2 batters and walked 1 and averaging 13.5 strikeouts per nine innings. His WHIP stood at 0.75, allowing 0 hits.

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

Split	K%	K/9	BB%	wOBA	xFIP	HH%
vs LHB	17.2%	6.7	8.3%	0.385	4.16	41.3%
vs RHB	21.4%	8.3	10.2%	0.370	4.82	41.6%
Overall	20.5%	8.0	9.8%	0.373	4.62	41.6%

Pitching Splits — K% & BB% (2021) Strikeout and walk rates against left-handed batters, right-handed batters, and overall.

Pitching Splits — wOBA (2021) Weighted on-base average allowed against left-handed batters, right-handed batters, and overall. Lower is better for pitchers.

Pitching Splits — HH% (2021) 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

5.39

P/IP

17.1

TBF

848

HH%

41.6%

Barrel%

8.0%

CSW%

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CSW Prev

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GB%

40.4%

FB%

59.6%

Bullpen

4.24

RSB

—

Batted Ball Profile (2021) 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. 2021 Season

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James Paxton MLB Stats 2021

James Paxton is a SP for the Seattle Mariners. View James's 2026 stats, recent performance trends, and key statistical categories to evaluate fantasy value and make informed DFS lineup decisions.

Stats updated November 5, 2026.