Janson Junk

Janson Junk

29-Year-Old PitcherSP
Miami Marlins
15-Day IL
Injury Elbow
Est. Return 9/8/2025
2025 Fantasy Outlook
There was no outlook written for Janson Junk in 2025. Check out the latest news below for more on his current fantasy value.
Signed a one-year contract with the Marlins in February of 2025.
Cleared to return Monday
PMiami Marlins
Elbow
September 5, 2025
Junk (elbow) will be activated from the 15-day injured list and start Monday against the Nationals, Christina De Nicola of MLB.com reports.
Analysis
Junk pitched well in what will be his lone rehab start, striking out eight over five innings of one-run ball Tuesday at Triple-A Jacksonville. The right-hander has been sidelined since late August with right ulnar nerve irritation in his pitching elbow. Junk has collected a 4.09 ERA and 61:10 K:BB over 88 innings covering 12 starts and five relief appearances for Miami in 2025.
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Pitching Stats
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2025 MLB Game Log
2025
2024
2023
2022
2021
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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2021 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
76
Last 10 Games
84
Last 5 Games
88
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 2023
 
 
-15%
BAA vs RHP
2025
 
 
-16%
BAA vs RHP
2024
 
 
-35%
BAA vs RHP
2023
 
 
-17%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .317 222 32 13 64 16 1 6
Since 2023vs Right .268 214 42 3 55 16 0 4
2025vs Left .291 179 27 8 48 13 1 4
2025vs Right .243 176 34 2 41 12 0 2
2024vs Left .647 20 1 3 11 1 0 2
2024vs Right .423 28 7 1 11 3 0 1
2023vs Left .250 23 4 2 5 2 0 0
2023vs Right .300 10 1 0 3 1 0 1
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2023
 
 
-31%
ERA on Road
2025
 
 
-18%
ERA on Road
2024
 
 
-75%
ERA on Road
2023
 
 
-100%
ERA at Home
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2023Home 5.96 1.37 48.1 2 2 0 7.8 1.5 0.9
Since 2023Away 4.09 1.25 55.0 4 1 1 5.2 1.3 0.8
2025Home 4.54 1.08 39.2 2 2 0 7.5 1.1 0.5
2025Away 3.72 1.16 48.1 4 0 1 5.2 0.9 0.7
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
2023Home 0.00 0.38 2.2 0 0 0 10.1 0.0 0.0
2023Away 7.71 1.93 4.2 0 1 0 3.9 3.9 1.9
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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
6.10
 
K/9
6.2
 
BB/9
1.0
 
HR/9
0.6
 
Fastball
93.7 mph
 
ERA
4.09
 
WHIP
1.13
 
BABIP
.307
 
GB/FB
1.25
 
Left On Base
61.8%
 
Exit Velocity
84.4 mph
 
Barrels/BBE
4.3%
 
Spin Rate
2312 rpm
 
Balls Hit 95+ MPH
29.5%
 
Swinging Strike
9.1%
 
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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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
Sharp in rehab start
PMiami Marlins
Elbow
September 5, 2025
Junk (elbow) struck out eight and allowed one earned run on three hits and no walks over five innings in a rehab start Tuesday with Triple-A Jacksonville.
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Cleared for rehab start
PMiami Marlins
Elbow
September 1, 2025
Junk (elbow) will begin a rehab assignment Tuesday, Kevin Barral of FishonFirst.com reports.
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Out with ulnar nerve irritation
PMiami Marlins
Elbow
August 27, 2025
The Marlins placed Junk on the 15-day injured list Wednesday due to right ulnar nerve irritation.
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Departs start with arm discomfort
PMiami Marlins
Forearm
August 23, 2025
Junk left Saturday's game against the Blue Jays in the sixth inning due to right forearm discomfort, Daniel Alvarez-Montes of ElExtraBase.com reports.
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Lasts seven innings against Red Sox
PMiami Marlins
August 17, 2025
Junk didn't factor into the decision Sunday against Boston, allowing three runs on six hits and one walk across seven innings. He struck out six.
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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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