Janson Junk

Janson Junk

30-Year-Old PitcherSP
Miami Marlins
15-Day IL
Injury Lower Leg
Est. Return 6/29/2026
2026 Fantasy Outlook
Heading into last season, Junk had logged just 40 major league innings across four partial seasons, producing a 6.75 ERA with a 1.14 WHIP. In late May, Miami called him up from Triple-A Jacksonville to help stabilize an injury-ravaged pitching staff. He began in long-relief, then served as a primary pitcher, before joining Marlins' rotation. The result was a breakout campaign, though it included a brief injured-list stint due to right ulnar nerve irritation. His ERA matched its estimators, but repeating a 2.9 percent walk rate and 0.65 HR/9 will be difficult. That said, his 63.7 percent left on base rate was notably low, suggesting some bad luck. Even with increases in walks and homers, a normalized LOB mark could keep his ERA in check. Still, more walks would inflate his WHIP, and a below-average strikeout rate creates added risk. Junk should be given a chance to make the rotation but be ready to move on if things aren't going his way. Read Past Outlooks
RANKS
Rest of Season
From Preseason
#390
ADP
Signed a one-year, $798,000 contract with the Marlins in March of 2026.
Starts up throwing program
PMiami Marlins
Lower Leg
June 18, 2026
Junk (shin) was able to throw a light bullpen session earlier this week and could throw a higher-intensity side session in the coming days, MLB.com reports.
Analysis
Once Junk incorporates all of his pitches in a full-intensity session, he'll move on to facing hitters before eventually heading out on a rehab assignment. After landing on the 15-day injured list May 31 due to right shin bone inflammation, Junk appears to be tracking for a late-June or early-July return from the shelf.
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Pitching Stats
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2026 MLB Game Log
2026
2025
2024
2023
2022
2021
2026 MLB Game Log
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2025 MLB Game Log
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2024 MLB Game Log
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2023 MLB Game Log
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2022 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
87
Last 10 Games
88
Last 5 Games
93
How many pitches does Janson Junk generally throw?
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
What part of the game does Janson Junk generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2024
 
 
-27%
BAA vs RHP
2026
 
 
-45%
BAA vs RHP
2025
 
 
-20%
BAA vs RHP
2024
 
 
-35%
BAA vs RHP
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .323 416 65 22 124 27 3 13
Since 2024vs Right .236 334 63 8 75 18 0 6
2026vs Left .329 161 28 9 49 10 2 5
2026vs Right .180 94 15 4 16 2 0 3
2025vs Left .294 235 36 10 64 16 1 6
2025vs Right .236 212 41 3 48 13 0 2
2024vs Left .647 20 1 3 11 1 0 2
2024vs Right .423 28 7 1 11 3 0 1
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2024
 
 
-35%
ERA on Road
2026
 
 
-6%
ERA at Home
2025
 
 
-37%
ERA on Road
2024
 
 
-75%
ERA on Road
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2024Home 5.82 1.37 94.1 3 6 0 7.1 1.7 1.1
Since 2024Away 3.76 1.20 83.2 6 3 1 5.8 1.3 0.8
2026Home 4.70 1.20 38.1 1 3 0 6.6 1.6 1.2
2026Away 4.98 1.48 21.2 2 2 0 6.2 2.5 1.2
2025Home 5.22 1.22 50.0 2 3 0 7.2 1.4 0.7
2025Away 3.30 1.07 60.0 4 1 1 5.6 0.8 0.6
2024Home 18.00 3.67 6.0 0 0 0 9.0 4.5 4.5
2024Away 4.50 2.00 2.0 0 0 0 9.0 4.5 0.0
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Stat Review
How does Janson Junk compare to other starting pitchers?
This section compares his stats with all starting pitcher seasons from the previous three seasons (minimum 120 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 120 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
3.31
 
K/9
6.5
 
BB/9
2.0
 
HR/9
1.2
 
Fastball
94.3 mph
 
ERA
4.80
 
WHIP
1.30
 
BABIP
.311
 
GB/FB
1.24
 
Left On Base
65.9%
 
Exit Velocity
82.4 mph
 
Barrels/BBE
4.2%
 
Spin Rate
2225 rpm
 
Balls Hit 95+ MPH
24.9%
 
Swinging Strike
7.8%
 
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Janson Junk See More
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Past Fantasy Outlooks
2024
2023
Acquired from the Angels in the Hunter Renfroe trade in November of 2022, Junk made just two appearances during his first year with the Brewers. The 28-year-old covered 140 innings at Triple-A Nashville last season and finished with an underwhelming 4.18 ERA, 1.35 WHIP and 94:44 K:BB. A move to the bullpen could be on tap for Junk in 2024 given his plus-4.00 ERA and subpar strikeout numbers (6.9 K/9) at Triple-A over the previous two seasons.
The Angels acquired Junk from the Yankees in July of 2021 as part of the trade that sent Andrew Heaney to New York. Junk had an up-and-down initial taste of the majors, posting a 3.86 ERA and a 10:2 K:BB over 16.1 innings that season. He spent most of 2022 with Triple-A Salt Lake but had three scattered outings with the Angels. The right-hander looked good in his first start of the campaign, striking out eight batters in five scoreless innings but faltered in his next (and final) appearance, yielding six runs in 2.1 frames. Junk relies primarily on a fastball-slider combo -- the slider is the better offering, but the fastball is thrown with enough spin to be effective despite sitting in the low-to-mid-90s. He enjoyed a breakout campaign in 2021 at Double-A while in the Yankees system, posting a 1.78 ERA and 0.97 WHIP over 14 appearances. However, that performance looks like an outlier, as none of his his seasons before or since are on the same radar. That's not to say Junk won't be an effective big-leaguer, but he's not likely to evolve into a front-of-rotation starter. The Angels moved Junk to Milwaukee in November as part of a trade to acquire Hunter Renfroe. He's likely slated to start 2023 at Triple-A or in the big-league bullpen.
More Fantasy News
Winds up on 15-day IL
PMiami Marlins
Lower Leg
May 31, 2026
The Marlins placed Junk on the 15-day injured list Sunday due to right shin bone inflammation, Christina De Nicola of MLB.com reports.
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Not starting, could hit IL
PMiami Marlins
Undisclosed
May 31, 2026
Junk is no longer scheduled to start Sunday's game against the Mets and could be headed for the injured list, Christina De Nicola of MLB.com reports.
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Earns third win Monday
PMiami Marlins
May 25, 2026
Junk (3-5) earned the win Monday, allowing one run on eight hits and no walks over five innings against the Blue Jays. He struck out three.
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Roughed up for eight runs
PMiami Marlins
May 20, 2026
Junk (2-5) took the loss Wednesday against Atlanta, allowing eight runs on eight hits and no walks in five innings. He struck out three.
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Struggles in Friday's loss
PMiami Marlins
May 15, 2026
Junk (2-4) took the loss against the Rays on Friday, allowing seven runs on 10 hits and three walks while striking out four across 5.2 innings.
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Latest Fantasy Rumors
Better odds to start?
PMilwaukee Brewers
February 8, 2023
Junk may have an improved chance of making the Brewers' starting rotation after Adam McCalvy of MLB.com reported Tuesday that Aaron Ashby will be behind to begin camp due to shoulder fatigue.
Analysis
Ashby missed time with shoulder inflammation last season, so the team may exercise additional caution this time around. Junk was acquired from the Angels in November and may have a hard time cracking the rotation, even if Ashby is unavailable for Opening Day. Junk has just seven big-league appearances under his belt and has a 4.74 ERA over 24.2 frames.
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