15-Day IL
Injury Shoulder
Est. Return 5/16/2025
2025 Stats
W-L
1-1
ERA
2.70
WHIP
1.10
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
Will pitch in ACL games
Martinez (shoulder) began a throwing program Tuesday and will pitch in Arizona Complex League games next, MLB.com reports.
ANALYSIS
The Diamondbacks are hopeful Martinez will be able to return at the end of his 15-day stint on the injured list. He had experienced diminished velocity in a couple of outings before being placed on the IL but imaging came back clean for any structural damage.
The Diamondbacks are hopeful Martinez will be able to return at the end of his 15-day stint on the injured list. He had experienced diminished velocity in a couple of outings before being placed on the IL but imaging came back clean for any structural damage.
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
14
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
-5%
BAA vs RHP
2025
-75%
BAA vs LHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .230 | 52 | 35 | 32 | 2 | |||
| Since 2023vs Right | .218 | 64 | 18 | 45 | 3 | |||
| 2025vs Left | .059 | 8 | 6 | 1 | 0 | |||
| 2025vs Right | .235 | 3 | 0 | 4 | 1 | |||
| 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
-2%
ERA on Road
2025
-75%
ERA at Home
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 3.63 | 1.28 | 44.2 | 10.1 | 4.0 | ||||
| Since 2023Away | 3.56 | 1.52 | 48.0 | 12.4 | 6.2 | ||||
| 2025Home | 1.35 | 0.90 | 6.2 | 8.1 | 4.1 | ||||
| 2025Away | 5.40 | 1.50 | 3.1 | 13.5 | 8.1 | ||||
| 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
1.83K/9
9.9BB/9
5.4HR/9
0.9Fastball
99.3 mphERA
2.70WHIP
1.10BABIP
.189GB/FB
2.17Left On Base
72.9%Exit Velocity
76.4 mphBarrels/BBE
2.3%Spin Rate
1897 rpmBalls Hit 95+ MPH
14.0%Swinging Strike
11.6%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
Set to begin throwing program
Martinez (shoulder) will begin throwing later this week after being placed on the 15-day injured list Thursday, Alex Weiner of ArizonaSports.com reports.
ANALYSIS
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Receives promising imaging results
Martinez underwent an MRI on his right shoulder Saturday that showed no structural damage, Steve Gilbert of MLB.com reports.
ANALYSIS
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Hits IL with shoulder inflammation
The Diamondbacks placed Martinez on the 15-day injured list Thursday with right shoulder inflammation.
ANALYSIS
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Velo concerns could prompt IL stint
Diamondbacks manager Torey Lovullo said that Martinez is scheduled to get imaging on his right shoulder after displaying diminished velocity during his relief appearance in Wednesday's 4-3 win over the Mets, Steve Gilbert of MLB.com reports. "We're still trying to sift through it ourselves," Lovullo said of Martinez. "We just wanted to get the feeling from him as to how he's doing. It's clear that the velo is down and the stuff is not the same. We're still evaluating."
ANALYSIS
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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
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