Janson Junk

Janson Junk

30-Year-Old PitcherSP
Miami Marlins
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
From Preseason
#392
ADP
$Signed a one-year contract with the Marlins in February of 2025.
Clean inning in spring debut
PMiami Marlins
March 8, 2026
Junk (ankle) struck out two batters and allowed one hit and no walks over a scoreless inning of relief in Saturday's 5-4 loss to the Astros in Grapefruit League play.
Analysis
Junk went down with a Grade 1 right ankle sprain early in camp, but after advancing through his throwing program over the last few weeks, he was finally cleared to make his spring debut Saturday. The 30-year-old right-hander made 16 of his 21 appearances with the Marlins last season as a starter, but the ankle issue may have cost him whatever small chance he had at a spot in Miami's Opening Day rotation. Junk should still be in good shape to break camp with the big club as a long man out of the bullpen.
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Pitching Stats
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2025
2024
2023
2022
2021
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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
77
Last 10 Games
85
Last 5 Games
84
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
 
 
-18%
BAA vs RHP
2025
 
 
-20%
BAA vs RHP
2024
 
 
-35%
BAA vs RHP
2023
 
 
-17%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .314 278 41 15 80 19 1 8
Since 2023vs Right .259 250 49 4 62 17 0 4
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
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
 
 
-42%
ERA on Road
2025
 
 
-37%
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 6.29 1.43 58.2 2 3 0 7.5 1.7 1.1
Since 2023Away 3.65 1.16 66.2 4 2 1 5.5 1.1 0.7
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
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
More Splits View More Split Stats
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
5.92
 
K/9
6.3
 
BB/9
1.1
 
HR/9
0.7
 
Fastball
93.7 mph
 
ERA
4.17
 
WHIP
1.14
 
BABIP
.308
 
GB/FB
1.27
 
Left On Base
62.4%
 
Exit Velocity
84.3 mph
 
Barrels/BBE
4.8%
 
Spin Rate
2303 rpm
 
Balls Hit 95+ MPH
29.4%
 
Swinging Strike
8.8%
 
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
Spring debut coming Saturday
PMiami Marlins
Ankle
March 2, 2026
Junk (ankle) is slated to make his Grapefruit League debut Saturday against the Astros, Christina De Nicola of MLB.com reports.
Analysis
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Set for bullpen session
PMiami Marlins
Ankle
February 25, 2026
Junk (ankle) will throw a bullpen session Wednesday, Stephen Strom of Marlins Radio Network reports.
Analysis
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Aims for mound work this week
PMiami Marlins
Ankle
February 23, 2026
Junk (ankle) is aiming to throw off the mound by Wednesday or Thursday, Stephen Strom of Marlins Radio Network reports.
Analysis
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Sheds walking boot
PMiami Marlins
Ankle
February 21, 2026
Junk (ankle) played catch Saturday without a boot, Christina De Nicola of MLB.com reports.
Analysis
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Has mild ankle sprain
PMiami Marlins
Ankle
February 19, 2026
Junk has been diagnosed with a Grade 1 mild right ankle sprain, Christina De Nicola of MLB.com reports.
Analysis
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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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