Ryan Zeferjahn

Active

Los Angeles Angels · Pitcher

Age 286' 5" · 209 lbsThrows Right

FBaseball Overview

Zeferjahn enters 2026 as a multi-inning relief option for the Angels with modest dual eligibility that offers limited but intriguing fantasy appeal in deeper leagues. His strikeout production remains respectable—he's punched out 53 batters in 38 innings so far this season—though his ERA and WHIP suggest he's still searching for consistency after an uneven debut season in 2025. The modest save total (2 SV) indicates he operates primarily as a setup or middle reliever rather than a high-volume closer, limiting his value in traditional categories. For fantasy managers, Zeferjahn represents a speculative bench stash in AL-only formats or deep mixed leagues, with upside contingent on improved command and a potential pathway to more save opportunities if the Angels' closer situation shifts.

MLB Pitching

Year	Team	G	GS	W	L	SV	ERA	WHIP	K	IP	BB
2024	Los Angeles Angels	12	0	0	0	0	2.12	0.76	18	17.0	6
2025	Los Angeles Angels	62	1	6	5	2	4.74	1.47	73	57.0	35
2026	Los Angeles Angels	35	0	4	3	2	3.98	1.28	56	40.2	31
Career	Totals	109	1	10	8	4	4.08	1.30	147	114.2	72

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

Minor League Pitching

Year	Team	G	GS	W	L	SV	ERA	WHIP	K	IP	BB
2019	Lowell Spinners	12	12	0	2	0	4.50	1.64	31	22.0	12
2021	2 teams▼	16	16	1	4	0	5.98	1.49	59	55.2	18
2022	2 teams▼	34	5	5	4	1	5.05	1.32	80	71.1	33
2023	2 teams▼	36	1	1	4	2	4.70	1.65	70	46	40
2024	3 teams▼	23	1	0	3	4	4.73	1.33	39	32.1	18
Career	Totals	128	35	8	17	10	4.82	1.43	301	240.3	124

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 Velo97.0 mph

Avg Spin2433 rpm

Whiff %33.3%

K %31.3%

BB %16.8%

Hard Hit %35.3%

Barrel %4.7%

xERA3.34

xBA Against0.163

xSLG Against0.263

BA Against0.150

SLG Against0.264

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

2024

Los Angeles Angels

2.12

0.76

17.0

2025

Los Angeles Angels

4.74

1.47

57.0

2026

Los Angeles Angels

3.98

1.28

40.2

Career

Totals

109

4.08

1.30

147

114.2

Year

Team

ERA

WHIP

2019

Lowell Spinners

4.50

1.64

22.0

2021

2 teams▼

5.98

1.49

55.2

2022

2 teams▼

5.05

1.32

71.1

2023

2 teams▼

4.70

1.65

2024

3 teams▼

4.73

1.33

32.1

Career

Totals

128

4.82

1.43

301

240.3

124