Janson Junk

Active

Miami Marlins · SP/RP

Age 306' 2" · 197 lbsThrows Right

#444 Current

FBaseball Overview

At 30 years old, Junk operates as a depth arm in Jacksonville's rotation, offering modest strikeout production with 43 K through 60 innings in 2026 but carrying significant risk with a 4.80 ERA and 1.30 WHIP that represent a step backward from his 2025 campaign. His 3-5 win-loss record and lack of save opportunities limit his ceiling in win-dependent formats, though he remains a potential streaming option in deep leagues during favorable matchups. The deterioration in both ERA and WHIP compared to 2025 suggests he may struggle to hold consistent fantasy value, making him a cautionary pick for most fantasy rotations unless his command improves substantially.

News Updates

Junk returns from IL, leads Marlins to victory
Janson Junk made his first start back from the injured list, earning a win against the Mariners as Miami improved to 10 games above .500. The right-hander's return marks a significant boost for the hot Marlins, who have been the most successful team in baseball recently. This is a major fantasy impact as Junk resumes his role in the Marlins' rotation.
Jul 10, 2026

MLB Pitching

Year	Team	G	GS	W	L	SV	ERA	WHIP	K	IP	BB
2021	Los Angeles Angels	4	4	0	1	0	3.86	1.35	10	16.1	2
2022	Los Angeles Angels	3	2	1	1	0	6.48	1.56	11	8.1	3
2023	Milwaukee Brewers	2	1	0	1	0	4.91	1.36	5	7.1	2
2024	2 teams▼	6	0	0	0	0	14.63	3.25	8	8.0	4
2025	Miami Marlins	21	16	6	4	1	4.17	1.14	77	110.0	13
2026	Miami Marlins	26	25	6	9	0	4.22	1.29	89	123.2	33
Career	Totals	62	48	13	16	1	4.57	1.30	200	273.2	57

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	2 teams▼	11	0	1	2	0	0.71	1.74	10	12.2	6
2018	Charleston RiverDogs	17	15	7	5	0	3.77	1.28	71	88.1	31
2019	3 teams▼	22	14	4	7	0	5.54	1.65	81	87.2	42
2021	2 teams▼	19	17	6	3	1	2.81	1.10	97	93.0	27
2022	Salt Lake Bees	16	15	1	7	0	4.64	1.29	69	73.2	18
2023	Nashville Sounds	27	25	7	10	0	4.18	1.35	94	140.0	44
2024	3 teams▼	24	9	3	5	2	3.58	1.28	54	60.1	21
2025	Jacksonville Jumbo Shrimp	10	9	5	3	0	2.68	0.95	48	50.1	7
2026	Jacksonville Jumbo Shrimp	2	2	0	0	0	3.18	1.41	6	5.2	0
Career	Totals	148	106	34	42	3	3.90	1.31	530	611.2	196

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	6	26.1	0-1	0	4.10	1.22	21	7

30 games

G	GS	IP	W-L	SV	ERA	WHIP	K	BB
26	25	123.2	6-9	0	4.22	1.29	89	33

Game Log2026 MLB

Loading game log…

Advanced Stats2026 season · via Baseball Savant

Click for year to year changes

FB Velo94.0 mph

Avg Spin2227 rpm

Whiff %15.9%

K %17.0%

BB %6.3%

Hard Hit %38.3%

Barrel %7.3%

xERA4.21

xBA Against0.255

xSLG Against0.409

BA Against0.264

SLG Against0.414

GB%43.7%

FB%23.5%

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

2021

Los Angeles Angels

3.86

1.35

16.1

2022

Los Angeles Angels

6.48

1.56

8.1

2023

Milwaukee Brewers

4.91

1.36

7.1

2024

2 teams▼

14.63

3.25

8.0

2025

Miami Marlins

4.17

1.14

110.0

2026

Miami Marlins

4.22

1.29

123.2

Career

Totals

4.57

1.30

200

273.2

Year

Team

ERA

WHIP

2017

2 teams▼

0.71

1.74

12.2

2018

Charleston RiverDogs

3.77

1.28

88.1

2019

3 teams▼

5.54

1.65

87.2

2021

2 teams▼

2.81

1.10

93.0

2022

Salt Lake Bees

4.64

1.29

73.2

2023

Nashville Sounds

4.18

1.35

140.0

2024

3 teams▼

3.58

1.28

60.1

2025

Jacksonville Jumbo Shrimp

2.68

0.95

50.1

2026

Jacksonville Jumbo Shrimp

3.18

1.41

5.2

Career

Totals

148

106

3.90

1.31

530

611.2

196

W-L

ERA

WHIP

26.1

0-1

4.10

1.22

W-L

ERA

WHIP

123.2

6-9

4.22

1.29