Jacob Lopez

Active

Athletics · SP

Age 286' 4" · 220 lbsThrows Left

#744 Current#354 Preseason

FBaseball Overview

This 28-year-old right-hander operates as a mid-rotation starter for Las Vegas, offering strikeout potential with 113 K in 2025 that has carried into 2026, though his command has deteriorated noticeably this season with a 1.84 WHIP and 6.75 ERA through early action. His win-loss record remains pedestrian (4-3 in 2026), reflecting both inconsistent run support and elevated ERA concerns that make him a risky fantasy asset for ERA and WHIP categories despite solid K production. The significant regression from his 2025 campaign (4.08 ERA, 1.27 WHIP) suggests Lopez is experiencing control issues that fantasy managers should monitor closely before committing in deeper leagues. He holds appeal primarily as a strikeout source in formats valuing volume, but his inability to pile up wins and worsening efficiency metrics make him better suited as a back-end rotation piece than a reliable fantasy contributor.

MLB Pitching

Year	Team	G	GS	W	L	SV	ERA	WHIP	K	IP	BB
2023	Tampa Bay Rays	4	1	1	0	1	4.38	1.30	8	12.1	2
2024	Tampa Bay Rays	4	1	0	0	0	5.23	1.16	8	10.1	7
2025	Athletics	21	17	7	7	0	4.08	1.27	113	92.2	37
2026	Athletics	27	24	7	5	0	5.47	1.49	112	123.1	58
Career	Totals	56	43	15	12	1	4.86	1.38	241	238.2	104

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
2018	AZL Giants Orange	9	4	1	1	0	1.42	0.95	34	25.1	6
2019	2 teams▼	12	12	4	3	0	2.86	1.06	57	56.2	11
2021	2 teams▼	15	11	3	1	2	2.41	1.02	96	59.2	18
2023	2 teams▼	26	24	4	5	0	2.68	1.19	132	107.1	56
2024	Durham Bulls	21	19	4	7	0	4.26	1.31	106	88.2	45
2025	Las Vegas Aviators	6	4	3	0	0	2.33	0.89	38	27.0	8
2026	Las Vegas Aviators	4	4	2	2	0	7.20	1.73	17	15.0	5
Career	Totals	93	78	21	19	2	3.11	1.16	480	379.2	149

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

Last Week / Last Month

Current season · MLB only

7 games

G	GS	IP	W-L	SV	ERA	WHIP	K	BB
7	7	35.1	2-1	0	6.11	1.39	31	12

30 games

G	GS	IP	W-L	SV	ERA	WHIP	K	BB
27	24	123.1	7-5	0	5.47	1.49	112	58

Game Log2026 MLB

Loading game log…

Advanced Stats2026 season · via Baseball Savant

Click for year to year changes

FB Velo90.3 mph

Avg Spin2257 rpm

Whiff %24.1%

K %20.3%

BB %10.5%

Hard Hit %31.3%

Barrel %6.9%

xERA3.65

xBA Against0.214

xSLG Against0.357

BA Against0.262

SLG Against0.453

GB%32.4%

FB%34.7%

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.

Loading player data...

Year

Team

ERA

WHIP

2023

Tampa Bay Rays

4.38

1.30

12.1

2024

Tampa Bay Rays

5.23

1.16

10.1

2025

Athletics

4.08

1.27

113

92.2

2026

Athletics

5.47

1.49

112

123.1

Career

Totals

4.86

1.38

241

238.2

104

Year

Team

ERA

WHIP

2018

AZL Giants Orange

1.42

0.95

25.1

2019

2 teams▼

2.86

1.06

56.2

2021

2 teams▼

2.41

1.02

59.2

2023

2 teams▼

2.68

1.19

132

107.1

2024

Durham Bulls

4.26

1.31

106

88.2

2025

Las Vegas Aviators

2.33

0.89

27.0

2026

Las Vegas Aviators

7.20

1.73

15.0

Career

Totals

3.11

1.16

480

379.2

149

W-L

ERA

WHIP

35.1

2-1

6.11

1.39

W-L

ERA

WHIP

123.1

7-5

5.47

1.49

112