Jack Leiter

ActiveIL

Texas Rangers · Pitcher

Age 266' 1" · 205 lbsThrows Right

FBaseball Overview

In his third MLB season, the Texas Rangers' right-hander shows mixed results as he continues to develop in a full-time rotation role. His 2025 campaign demonstrated genuine promise with a 3.86 ERA, 1.28 WHIP, and 148 strikeouts across 151.2 innings, offering solid upside in strikeout and ERA categories for fantasy managers. However, a significant regression in 2026—evidenced by a 5.29 ERA, 1.44 WHIP, and declining win-loss record (3-7)—raises concerns about consistency and whether his 2025 performance represents his true talent level. The high strikeout rate (148 K last year) remains an attractive fantasy asset, but managers should approach him cautiously until he demonstrates whether 2026 is a temporary stumble or a troubling trend in his development trajectory.

MLB Pitching

Year	Team	G	GS	W	L	ERA	WHIP	K	IP	BB
2024	Texas Rangers	9	6	0	3	8.83	1.71	31	35.2	17
2025	Texas Rangers	29	29	10	10	3.86	1.28	148	151.2	67
2026	Texas Rangers	15	15	3	7	5.29	1.44	83	80.0	35
Career	Totals	53	50	13	20	4.95	1.38	262	267.1	119

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
2022	Frisco RoughRiders	23	22	3	10	5.54	1.55	109	92.2	56
2023	2 teams▼	20	20	2	6	5.19	1.46	114	85	49
2024	Round Rock Express	17	16	6	4	3.51	1.26	110	77.0	35
2025	Round Rock Express	1	1	0	0	0.00	0.43	4	4.2	1
Career	Totals	61	59	11	20	4.72	1.42	337	259.1	141

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

Game Log2026 season

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Pitching Analytics2026 season · via Baseball Savant

Click for year to year changes

FB Velo96.5 mph

Avg Spin2347 rpm

Whiff %25.4%

K %23.4%

BB %9.9%

Hard Hit %39.9%

Barrel %10.3%

xERA4.81

xBA Against0.257

xSLG Against0.43

BA Against0.255

SLG Against0.439

GB%37.3%

FB%31.3%

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

Texas Rangers

8.83

1.71

35.2

2025

Texas Rangers

3.86

1.28

148

151.2

2026

Texas Rangers

5.29

1.44

80.0

Career

Totals

4.95

1.38

262

267.1

119

Year

Team

ERA

WHIP

2022

Frisco RoughRiders

5.54

1.55

109

92.2

2023

2 teams▼

5.19

1.46

114

2024

Round Rock Express

3.51

1.26

110

77.0

2025

Round Rock Express

0.00

0.43

4.2

Career

Totals

4.72

1.42

337

259.1

141