Mason Miller

Active

San Diego Padres · Pitcher

Age 276' 5" · 200 lbsThrows Right

FBaseball Overview

Following his All-Star and All-MLB Second Team selection in 2024, Miller has established himself as a dominant late-inning weapon for San Diego, with 21 saves already in the 2026 season and a sparkling 0.78 ERA and 0.84 WHIP through 34.2 innings. His strikeout prowess remains elite, consistently posting triple-digit K totals, making him a reliable anchor in the strikeouts category while delivering saves in a competitive closer role. The primary risk centers on durability and innings usage at the back of the bullpen, where workload can fluctuate dramatically week-to-week, potentially affecting win-loss record consistency. Managers targeting Miller should view him as a premium closer with exceptional ERA and WHIP upside, though pairing him with a high-volume starting pitcher helps offset the volatility inherent in relief pitching roles.

MLB Pitching

Year	Team	G	GS	W	L	SV	ERA	WHIP	K	IP	BB
2023	Oakland Athletics	10	6	0	3	0	3.78	1.20	38	33.1	16
2024	Oakland Athletics	55	0	2	2	28	2.49	0.88	104	65.0	21
2025	2 teams▼	60	0	1	2	22	2.63	0.91	104	61.2	28
2026	San Diego Padres	35	0	2	1	22	0.98	0.82	67	36.2	13
Career	Totals	160	6	5	8	72	2.47	0.93	313	196.2	78

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
2021	ACL Athletics	3	2	0	1	1.50	1.17	9	6.0	3
2022	2 teams▼	3	3	0	1	3.86	0.71	13	7.0	2
2023	3 teams▼	7	7	1	0	1.86	0.67	35	19.1	5
Career	Totals	13	12	1	2	2.23	0.80	56	32.1	9

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

Game Log2026 season

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Analytics2026 season · via Baseball Savant

Click for year to year changes

FB Velo101.3 mph

Avg Spin2461 rpm

Whiff %47.5%

K %48.2%

BB %9.4%

Hard Hit %20.7%

Barrel %1.7%

xERA1.36

xBA Against0.124

xSLG Against0.158

BA Against0.137

SLG Against0.137

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.

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Year

Team

ERA

WHIP

2023

Oakland Athletics

3.78

1.20

33.1

2024

Oakland Athletics

2.49

0.88

104

65.0

2025

2 teams▼

2.63

0.91

104

61.2

2026

San Diego Padres

0.98

0.82

36.2

Career

Totals

160

2.47

0.93

313

196.2

Year

Team

ERA

WHIP

2021

ACL Athletics

1.50

1.17

6.0

2022

2 teams▼

3.86

0.71

7.0

2023

3 teams▼

1.86

0.67

19.1

Career

Totals

2.23

0.80

32.1