Janson Junk

Janson Junk

29-Year-Old PitcherSP
Miami Marlins
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.
Hit hard in no-decision
PMiami Marlins
August 13, 2025
Junk came away with a no-decision Tuesday against the Guardians, giving up three runs on six hits over five innings as the Marlins lost 4-3. He struck out two without walking a batter.
Analysis
Four of the six hits off Junk went for extra bases, including back-to-back solo shots by Jose Ramirez and Kyle Manzardo in the first inning. The right-hander was taken off the hook for his seventh loss of the season when Miami was able to tie the game at 3-3 in the fifth frame. Junk hasn't recorded an out in the sixth inning since the All-Star break, working exactly five innings in each of his last five starts while stumbling to a 6.84 ERA, 1.40 WHIP and 14:4 K:BB. He could get bumped aside by top prospect Robby Snelling at some point, but for the moment Junk lines up to make his next start on the road this weekend in Boston.
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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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Pitching Appearances Breakdown
Average Pitch Count
74
Last 10 Games
82
Last 5 Games
83
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
 
 
-16%
BAA vs RHP
2025
 
 
-17%
BAA vs RHP
2024
 
 
-35%
BAA vs RHP
2023
 
 
-17%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .322 196 27 11 58 14 1 5
Since 2023vs Right .272 189 38 3 49 15 0 4
2025vs Left .294 153 22 6 42 11 1 3
2025vs Right .243 151 30 2 35 11 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
 
 
-33%
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 6.12 1.38 42.2 2 2 0 8.2 1.5 1.1
Since 2023Away 4.13 1.29 48.0 4 1 1 4.9 1.3 0.8
2025Home 4.50 1.06 34.0 2 2 0 7.9 1.1 0.5
2025Away 3.70 1.19 41.1 4 0 1 4.8 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
6.50
 
K/9
6.2
 
BB/9
1.0
 
HR/9
0.6
 
Fastball
93.7 mph
 
ERA
4.06
 
WHIP
1.13
 
BABIP
.310
 
GB/FB
1.19
 
Left On Base
61.5%
 
Exit Velocity
84.4 mph
 
Barrels/BBE
4.4%
 
Spin Rate
2311 rpm
 
Balls Hit 95+ MPH
29.4%
 
Swinging Strike
9.2%
 
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
Up and down in sixth win
PMiami Marlins
August 6, 2025
Junk (6-2) recorded the win Wednesday against the Astros, allowing three runs on five hits and two walks in five innings. He struck out two.
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Falters after strong start
PMiami Marlins
August 2, 2025
Junk took a no-decision in Friday's 13-12 win over the Yankees, allowing six runs on six hits and one walk in five innings. He struck out four.
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Strikes out five in win
PMiami Marlins
July 26, 2025
Junk (5-2) earned the win against the Brewers on Saturday, allowing three runs on eight hits and no walks with five strikeouts over five innings.
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Knocked around in loss
PMiami Marlins
July 20, 2025
Junk (4-2) yielded six runs (five earned) on six hits and a walk over five innings Sunday, striking out one and taking a loss against Kansas City.
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Tosses seven scoreless frames
PMiami Marlins
July 13, 2025
Junk (4-1) earned the win Saturday, allowing five hits and no walks over seven scoreless innings in a 6-0 victory over the Orioles. He struck out two.
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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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