Juan Mejia

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Colorado Rockies · Pitcher

Age 266' 3" · 210 lbsThrows Right

FBaseball Overview

After a promising 2025 debut with a 3.96 ERA and 68 strikeouts in 61.1 innings, Mejia has struggled significantly in early 2026, posting a 6.38 ERA with a 1.69 WHIP across 36.2 innings while recording just one save. The young right-hander's inability to maintain velocity or command this season raises serious concerns about his fantasy utility, as his strikeout rate has dipped and his win-loss record sits at an ugly 1-6. While his 2025 emergence suggested potential for streaming upside, fantasy managers should approach Mejia with heavy caution in 2026 until he demonstrates he can recapture the control and effectiveness that made his rookie campaign intriguing. The Rockies' struggles and Mejia's current form make him a borderline dynasty hold at best and a fade in redraft formats.

News Updates

Mejia Earns Save as Colorado's Closer
Colorado Rockies reliever Juan Mejia picked up the save in Friday's 4-3 victory over the Giants after retiring the only batter he faced. The performance continues Mejia's work in the team's closer situation.
Jul 11, 2026

MLB Pitching

Year	Team	G	GS	W	L	SV	ERA	WHIP	K	IP	BB
2025	Colorado Rockies	55	0	2	2	1	3.96	1.26	68	61.1	25
2026	Colorado Rockies	58	1	3	6	4	5.55	1.70	56	61.2	37
Career	Totals	113	1	5	8	5	4.76	1.48	124	123	62

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
2017	DSL Rockies	16	1	3	1	0	2.84	1.11	27	31.2	11
2018	2 teams▼	13	13	3	5	0	5.43	1.57	61	58.0	22
2021	Fresno Grizzlies	43	1	3	5	8	4.82	1.44	66	46.2	23
2022	2 teams▼	44	0	3	3	6	4.68	1.44	60	50	27
2023	2 teams▼	48	0	3	5	2	5.06	1.43	86	58.2	32
2024	Hartford Yard Goats	47	0	4	4	6	5.00	1.61	65	54.0	30
2025	Albuquerque Isotopes	10	0	1	0	0	4.73	1.05	22	13.1	6
Career	Totals	221	15	20	23	22	4.78	1.44	387	312.1	151

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

Game Log2026 MLB

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Advanced Stats2026 season · via Baseball Savant

Click for year to year changes

FB Velo96.9 mph

Avg Spin2609 rpm

Whiff %24.4%

K %19.9%

BB %13.4%

Hard Hit %38.1%

Barrel %3.3%

xERA4.88

xBA Against0.264

xSLG Against0.386

BA Against0.281

SLG Against0.385

GB%43.4%

FB%24.2%

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

2025

Colorado Rockies

3.96

1.26

61.1

2026

Colorado Rockies

5.55

1.70

61.2

Career

Totals

113

4.76

1.48

124

123

Year

Team

ERA

WHIP

2017

DSL Rockies

2.84

1.11

31.2

2018

2 teams▼

5.43

1.57

58.0

2021

Fresno Grizzlies

4.82

1.44

46.2

2022

2 teams▼

4.68

1.44

2023

2 teams▼

5.06

1.43

58.2

2024

Hartford Yard Goats

5.00

1.61

54.0

2025

Albuquerque Isotopes

4.73

1.05

13.1

Career

Totals

221

4.78

1.44

387

312.1

151