2025 Stats
W-L
1-1
ERA
0.90
WHIP
0.80
K
11
SV
3
Rest-of-Season Projections
2025 Fantasy Outlook
Martinez struggled in his first exposure to the big leagues in 2023 and failed to break camp with the Diamondbacks last spring. The 23-year-old missed plenty of bats in the minors, striking out 14 across 6.2 innings for Triple-A Reno last year before his recall in late-April. Martinez still had trouble throwing strikes in the majors, but worked around his 11.7 percent walk rate to produce a solid 2.48 ERA over 72.2 innings. The flamethrower walked 36 to inflate his WHIP (1.31), but his splitter was absolutely devastating (.098 BAA, .122 SLG), generating a 54 percent whiff rate that was 3rd-highest in the league for that pitch type. He also averaged 100.3 mph on his sinker while inducing ground balls at a 60 percent clip. Martinez's ascension to the back-end of Arizona's bullpen was no surprise and he racked up eight of the team's 13 saves after Aug 1. He enters 2025 as the presumed favorite for saves in Arizona, but closing is no guarantee due to the traffic he allows. Read Past Outlooks
Yields run but earns save
Martinez allowed a run on one hit and two walks in one inning during Sunday's win over Atlanta. He earned a save and did not record a strikeout.
ANALYSIS
Martinez entered a 6-3 game and was not very effective. On top of the two walks, he also hit a batter. A double play before Marcell Ozuna's RBI double helped limit the damage to just one run. Martinez entered the game with a clean 0.00 ERA through nine innings. He didn't walk a batter in his first seven appearances but has now issued four free passes over his last 3.1 innings. Martinez was recently dealing with some shoulder fatigue but is the current favorite for saves with A.J. Puk (elbow) on the IL, though Shelby Miller may also be in the mix.
Martinez entered a 6-3 game and was not very effective. On top of the two walks, he also hit a batter. A double play before Marcell Ozuna's RBI double helped limit the damage to just one run. Martinez entered the game with a clean 0.00 ERA through nine innings. He didn't walk a batter in his first seven appearances but has now issued four free passes over his last 3.1 innings. Martinez was recently dealing with some shoulder fatigue but is the current favorite for saves with A.J. Puk (elbow) on the IL, though Shelby Miller may also be in the mix.
Pitching Stats
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2025
2024
2023
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
14
Last 10 Games
14
Last 5 Games
13
How many pitches does Justin Martinez 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+
What part of the game does Justin Martinez generally pitch?
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
-7%
BAA vs RHP
2025
-69%
BAA vs LHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .230 | 52 | 33 | 32 | 2 | |||
| Since 2023vs Right | .215 | 64 | 18 | 44 | 2 | |||
| 2025vs Left | .059 | 8 | 4 | 1 | 0 | |||
| 2025vs Right | .188 | 3 | 0 | 3 | 0 | |||
| 2024vs Left | .221 | 39 | 22 | 23 | 1 | |||
| 2024vs Right | .221 | 52 | 14 | 36 | 1 | |||
| 2023vs Left | .444 | 5 | 7 | 8 | 1 | |||
| 2023vs Right | .192 | 9 | 4 | 5 | 1 | |||
| More Splits→ | View More Split Stats | |||||||
Home/Away Pitching Splits
Since 2023
-12%
ERA on Road
2025
-100%
ERA on Road
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 3.63 | 1.28 | 44.2 | 10.1 | 4.0 | ||||
| Since 2023Away | 3.19 | 1.46 | 48.0 | 12.4 | 5.8 | ||||
| 2025Home | 1.35 | 0.90 | 6.2 | 8.1 | 4.1 | ||||
| 2025Away | 0.00 | 0.60 | 3.1 | 13.5 | 2.7 | ||||
| 2024Home | 2.16 | 1.20 | 33.1 | 10.0 | 3.0 | ||||
| 2024Away | 2.75 | 1.40 | 39.1 | 12.4 | 5.7 | ||||
| 2023Home | 17.36 | 2.36 | 4.2 | 13.5 | 11.6 | ||||
| 2023Away | 8.44 | 2.44 | 5.1 | 11.8 | 8.4 | ||||
| More Splits→ | View More Split Stats | ||||||||
Stat Review
How does Justin Martinez compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 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 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
2.75K/9
9.9BB/9
3.6HR/9
0.0Fastball
99.8 mphERA
0.90WHIP
0.80BABIP
.189GB/FB
2.60Left On Base
75.0%Exit Velocity
75.7 mphBarrels/BBE
0.0%Spin Rate
1896 rpmBalls Hit 95+ MPH
11.9%Swinging Strike
12.7%Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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More Fantasy News
Fires clean ninth inning in return
Martinez (shoulder) returned to the mound in Wednesday's extra-inning loss to the Rays, striking out one during a clean ninth inning.
ANALYSIS
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Battling shoulder fatigue
Diamondbacks manager Torey Lovullo said Tuesday that Martinez is dealing with right shoulder fatigue, Jack Sommers of SI.com reports.
ANALYSIS
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Was unavailable due to fatigue
Diamondbacks manager Torey Lovullo said that Martinez was unavailable to pitch in Sunday's extra-innings win over the Cubs due to "fatigue" and a recent heavy workload, Jack Sommers of SI.com reports.
ANALYSIS
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Stepping in as full-time closer
Martinez is expected to be the Diamondbacks' primary closer after the team placed A.J. Puk (elbow) on the 15-day injured list Saturday.
ANALYSIS
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Finishes off Miami
Martinez worked a scoreless inning, retiring all three batters he faced in Wednesday's 6-2 win over the Marlins.
ANALYSIS
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