2025 Stats
W-L
13-15
ERA
4.83
WHIP
1.26
K
175
SV
0
Rest-of-Season Projections
2025 Fantasy Outlook
Gallen turned in another solid but not ace-level season. His career 26.6 percent strikeout rate is very good, but not elite. Last year, it was a career low of 25.1 percent. After two years of declining walk rates, Gallen's 8.7 percent clip was a smidge worse than average. Yielding only 13 homers in 148 frames kept Gallen's ERA in check, but if the 2025 baseball is livelier than the 2024 version, Gallen's ratios could suffer, unless he returns to a lower walk rate. Gallen's velocity was in sync with past seasons, so it's a matter of throwing more strikes. In 2023, 64.5 percent of his pitches were strikes, compared to only 61.9 percent last season. There was a time when Gallen fanned 28 percent of batters and was a back end SP1. He's now a solid SP3, with SP2 upside if he can throw more pitches in the zone. Read Past Outlooks

Poor end to rough season
Gallen (13-15) allowed six runs (five earned) on seven hits and three walks while striking out three over 4.1 innings to take the loss versus the Padres on Friday.
Analysis
A Fernando Tatis grand slam in the fourth inning flipped this game in the Padres' favor. Gallen was pushed back a day after dealing with fatigue stemming from an illness in recent weeks, but his final start of 2025 was reflective of his year as a whole. The right-hander finishes the season at a career-worst 4.83 ERA while adding a 1.26 WHIP and 175:66 K:BB over 192 innings through 33 starts. He also gave up a career-high 31 homers, an area in which the 30-year-old will need to improve if he is to get back on track in 2026.
A Fernando Tatis grand slam in the fourth inning flipped this game in the Padres' favor. Gallen was pushed back a day after dealing with fatigue stemming from an illness in recent weeks, but his final start of 2025 was reflective of his year as a whole. The right-hander finishes the season at a career-worst 4.83 ERA while adding a 1.26 WHIP and 175:66 K:BB over 192 innings through 33 starts. He also gave up a career-high 31 homers, an area in which the 30-year-old will need to improve if he is to get back on track in 2026.
Pitching Stats
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2025 MLB Game Log
2025
2024
2023
2022
2021
2020
2019
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
95
Last 10 Games
98
Last 5 Games
100
How many pitches does Zac Gallen 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 Zac Gallen 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
-3%
BAA vs RHP
2025
-13%
BAA vs RHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2023vs Left | .242 | 259 | 85 | 246 | 33 | |||
Since 2023vs Right | .234 | 292 | 82 | 251 | 33 | |||
2025vs Left | .256 | 76 | 34 | 92 | 12 | |||
2025vs Right | .223 | 99 | 32 | 84 | 19 | |||
2024vs Left | .222 | 77 | 25 | 61 | 7 | |||
2024vs Right | .252 | 79 | 29 | 72 | 6 | |||
2023vs Left | .244 | 106 | 26 | 93 | 14 | |||
2023vs Right | .232 | 114 | 21 | 95 | 8 | |||
More Splits→ | View More Split Stats |
Home/Away Pitching Splits
Since 2023
-24%
ERA at Home
2025
-11%
ERA at Home
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2023Home | 3.46 | 1.15 | 283.2 | 9.6 | 2.5 | ||||
Since 2023Away | 4.56 | 1.27 | 266.1 | 8.3 | 3.0 | ||||
2025Home | 4.56 | 1.25 | 98.2 | 8.6 | 3.3 | ||||
2025Away | 5.11 | 1.28 | 93.1 | 7.8 | 2.9 | ||||
2024Home | 3.36 | 1.19 | 83.0 | 9.8 | 2.7 | ||||
2024Away | 4.02 | 1.35 | 65.0 | 9.1 | 4.0 | ||||
2023Home | 2.47 | 1.03 | 102.0 | 10.6 | 1.6 | ||||
2023Away | 4.42 | 1.20 | 108.0 | 8.3 | 2.4 | ||||
More Splits→ | View More Split Stats |
Stat Review
How does Zac Gallen 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.
* 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
2.65K/9
8.2BB/9
3.1HR/9
1.5Fastball
93.6 mphERA
4.83WHIP
1.26BABIP
.284GB/FB
1.31Left On Base
67.0%Exit Velocity
83.7 mphBarrels/BBE
6.5%Spin Rate
2209 rpmBalls Hit 95+ MPH
27.8%Swinging Strike
9.8%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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Past Fantasy Outlooks
2024
2023
2022
2021
2020
Gallen had a fantastic season and received some deserved votes for the Cy Young Award as he helped carry the Diamondbacks to their improbable World Series run. Most of his performance indicators were right in line with 2022 but better run support helped raise his wins while a near full-run jump in his ERA can be excused by the BABIP regression which we expected would come after his rather fortunate .237 BABIP in 2022. Simply put, there is not a performance issue to be concerned with as much as a workload concern. Gallen ended up throwing 243.2 innings in 2023, which was almost exactly double what he threw just two seasons ago. He managed a 52% increase in workload just fine from 2021 to 2022, but now we add another 32% increase in workload along with the stress of working in the postseason for the first time and we cannot help but wonder about the impact of that for 2024. 2023 was an excellent season, but it would not surprise us to see Gallen take a step back this season.
More Fantasy News

Pushed to Friday due to fatigue
Gallen's next start was pushed back a day to Friday in San Diego due to fatigue/illness, Jody Jackson of Bally Sports Arizona reports.
Analysis
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Strikes out nine in win
Gallen (13-14) allowed three runs on four hits and two walks while striking out nine over seven innings to earn the win Saturday over the Phillies.
Analysis
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Sharp in Monday's win
Gallen (12-14) allowed one run on two hits and a walk while striking out six over six innings to earn the win over the Giants on Monday.
Analysis
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Works deep in loss
Gallen (11-14) allowed five runs on five hits and three walks while striking out three over 6.2 innings to take the loss versus the Giants on Tuesday.
Analysis
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Blanks Texas for 11th win
Gallen (11-13) picked up the win Wednesday, allowing four hits and a walk over six scoreless innings in a 2-0 victory over the Rangers. He struck out five.
Analysis
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Latest Fantasy Rumors

Red Sox taking aim
The Red Sox have shown interest in acquiring Gallen, reports Rob Bradford of WEEI.com.
Analysis
Boston could use some rotation help and is looking and both Gallen and teammate Merrill Kelly. The 29-year-old Gallen is in the midst of the worst season of his career with a 5.60 ERA, 1.35 WHIP and 121:47 K:BB across 127 innings, though his expiring contract should mean the acquisition cost isn't too high. The right-hander entered the season with a 3.29 ERA through six MLB campaigns, and it's possible a change of scenery helps him regain that form.
Boston could use some rotation help and is looking and both Gallen and teammate Merrill Kelly. The 29-year-old Gallen is in the midst of the worst season of his career with a 5.60 ERA, 1.35 WHIP and 121:47 K:BB across 127 innings, though his expiring contract should mean the acquisition cost isn't too high. The right-hander entered the season with a 3.29 ERA through six MLB campaigns, and it's possible a change of scenery helps him regain that form.