2025 Stats
W-L
1-0
ERA
0.00
WHIP
0.50
K
11
SV
2
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
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
While it wasn't a save situation in a 5-5 game, fantasy managers should still be pleased to see the hard-throwing right-hander look sharp in his return to action. It was Martinez's first appearance since last Thursday due to right shoulder fatigue, and he should be ready to reclaim the closer's role for the time being in the absence of A.J. Puk (elbow). Through his first eight innings of the season, Martinez has converted both of his save opportunities while allowing just three hits, one walk and no runs en route to producing a pristine 11:1 K:BB.
While it wasn't a save situation in a 5-5 game, fantasy managers should still be pleased to see the hard-throwing right-hander look sharp in his return to action. It was Martinez's first appearance since last Thursday due to right shoulder fatigue, and he should be ready to reclaim the closer's role for the time being in the absence of A.J. Puk (elbow). Through his first eight innings of the season, Martinez has converted both of his save opportunities while allowing just three hits, one walk and no runs en route to producing a pristine 11:1 K:BB.
Pitching Stats
Loading Pitching Stats...
2025
2024
2023
Minor League Game Log
Calculate Stats Over Time
Just click on any two dates.
Loading Minor League Pitching Game Log...
Pitching Appearances Breakdown
Average Pitch Count
13
Last 10 Games
13
Last 5 Games
11
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
-9%
BAA vs RHP
2025
-54%
BAA vs LHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .235 | 52 | 30 | 32 | 2 | |||
| Since 2023vs Right | .213 | 64 | 18 | 43 | 2 | |||
| 2025vs Left | .071 | 8 | 1 | 1 | 0 | |||
| 2025vs Right | .154 | 3 | 0 | 2 | 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
-11%
ERA on Road
2025
No Stats
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 3.59 | 1.24 | 42.2 | 10.5 | 3.6 | ||||
| Since 2023Away | 3.19 | 1.46 | 48.0 | 12.4 | 5.8 | ||||
| 2025Home | 0.00 | 0.43 | 4.2 | 11.6 | 0.0 | ||||
| 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
10.00K/9
12.9BB/9
1.3HR/9
0.0Fastball
100.6 mphERA
0.00WHIP
0.57BABIP
.235GB/FB
3.33Left On Base
100.0%Exit Velocity
71.8 mphBarrels/BBE
0.0%Spin Rate
1821 rpmBalls Hit 95+ MPH
4.2%Swinging Strike
15.7%Prospect Rankings History
Advanced Pitching Stats
Loading Advanced Pitching Stats...
Defensive Stats
Loading MLB Defensive Stats...
Stats Vs Today's Lineup
Want more matchup stats?
Loading Matchup Stats...
Our full team depth charts are reserved for RotoWire subscribers.
Subscribe Now
Recent RotoWire Articles Featuring Justin Martinez See More
Brad Johnson reviews NL bullpens with question marks, including in Milwaukee, where Trevor Megill was torched in a recent outing and might have a knee injury.
Relievers like Luke Jackson of the Rangers are making a strong early impression, but will he be able to keep the closer job all year?
Dan Marcus is subbing in this week to give you the lowdown on a number of NL player recommendations.
A certain up-and-comer in St. Louis has been featured by Jan Levine among his weekly NL selections.
Much has been decided in the National League over the last few days, including the Giants' fifth starter job, which was won by Landen Roupp.
More Fantasy News
Battling shoulder fatigue
Diamondbacks manager Torey Lovullo said Tuesday that Martinez is dealing with right shoulder fatigue, Jack Sommers of SI.com reports.
ANALYSIS
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
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
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
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
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Finishes off Miami
Martinez worked a scoreless inning, retiring all three batters he faced in Wednesday's 6-2 win over the Marlins.
ANALYSIS
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Works smooth eighth inning
Martinez struck out two over one inning to earn a hold in Sunday's 5-2 win over the Brewers.
ANALYSIS
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.