2025 Stats
W-L
4-8
ERA
5.19
WHIP
1.35
K
81
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

Fades in seventh inning
Gallen allowed four runs on six hits and four walks while striking out six over 6.1 innings in a no-decision Saturday versus the Padres.
ANALYSIS
Gallen pitched well until the seventh inning, where he allowed three of the first four batters he faced to reach base. Ryan Thompson couldn't stop the Padres' rally, which cost Gallen a chance at the win, though the Diamondbacks pieced together a comeback for a walk-off in the ninth. This was the fourth time Gallen has walked a season-high four batters, and it continues a rough stretch for him, as he's now allowed four or more runs in six of his last seven starts. He's at a 5.19 ERA, 1.35 WHIP and 81:40 K:BB across 86.2 innings through 15 starts this season. His next outing is projected to be at Colorado.
Gallen pitched well until the seventh inning, where he allowed three of the first four batters he faced to reach base. Ryan Thompson couldn't stop the Padres' rally, which cost Gallen a chance at the win, though the Diamondbacks pieced together a comeback for a walk-off in the ninth. This was the fourth time Gallen has walked a season-high four batters, and it continues a rough stretch for him, as he's now allowed four or more runs in six of his last seven starts. He's at a 5.19 ERA, 1.35 WHIP and 81:40 K:BB across 86.2 innings through 15 starts this season. His next outing is projected to be at Colorado.
Pitching Stats
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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
95
Last 5 Games
94
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
-1%
BAA vs RHP
2025
-14%
BAA vs RHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2023vs Left | .238 | 217 | 74 | 196 | 27 | |||
Since 2023vs Right | .236 | 240 | 67 | 202 | 23 | |||
2025vs Left | .251 | 34 | 23 | 42 | 6 | |||
2025vs Right | .216 | 47 | 17 | 35 | 9 | |||
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
-14%
ERA at Home
2025
-40%
ERA on Road
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2023Home | 3.58 | 1.21 | 233.2 | 9.7 | 2.7 | ||||
Since 2023Away | 4.18 | 1.21 | 211.0 | 8.7 | 3.0 | ||||
2025Home | 6.29 | 1.62 | 48.2 | 7.8 | 5.0 | ||||
2025Away | 3.79 | 1.00 | 38.0 | 9.2 | 3.1 | ||||
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
2.03K/9
8.4BB/9
4.2HR/9
1.6Fastball
93.3 mphERA
5.19WHIP
1.35BABIP
.275GB/FB
1.20Left On Base
66.7%Exit Velocity
84.0 mphBarrels/BBE
6.4%Spin Rate
2235 rpmBalls Hit 95+ MPH
29.7%Swinging Strike
10.4%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

Allows three homers in loss
Gallen (4-8) took the loss against the Reds on Sunday, allowing four runs on six hits and three walks with five strikeouts over 6.2 innings.
ANALYSIS
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Picks up fourth win
Gallen (4-7) earned the win Tuesday in Atlanta after giving up three runs (one earned) on four hits and one walk over seven innings. He struck out four.
ANALYSIS
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Stumbles late in loss
Gallen (3-7) took the loss against the Pirates on Wednesday, allowing six runs (five earned) on six hits and three walks with three strikeouts over five innings.
ANALYSIS
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Pairs well with Herrera
Arizona manager Torey Lovullo had Jose Herrera catch Gallen for Friday's series opener against St. Louis after the pitcher had struggled in his previous outing, Joe Harris of MLB.com reports. The right-hander threw five strong innings before running into trouble in the sixth in a 4-3 loss.
ANALYSIS
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Struggles continue in sixth loss
Gallen (3-6) took the loss Friday against the Cardinals after allowing four runs on three hits and four walks in 5.2 innings. He struck out four.
ANALYSIS
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Latest Fantasy Rumors

Trade option for CHC?
Gallen could be a trade target for the Cubs ahead of the deadline, Jim Bowden of The Athletic speculates.
ANALYSIS
The season-ending elbow injury of Justin Steele, plus the fact that other potential starters are on the injured list, means the Cubs should undoubtedly add a starter or maybe two if they want to make a deep playoff run in October. Gallen is one of two Arizona pitchers they might target alongside Merrill Kelly. Gallen might have some suitors in the trade market, but he needs to start pitching better to deliver the Diamondbacks a solid package in return. The seven-year veteran owns a career-worst 5.15 ERA in 14 starts in 2025.
The season-ending elbow injury of Justin Steele, plus the fact that other potential starters are on the injured list, means the Cubs should undoubtedly add a starter or maybe two if they want to make a deep playoff run in October. Gallen is one of two Arizona pitchers they might target alongside Merrill Kelly. Gallen might have some suitors in the trade market, but he needs to start pitching better to deliver the Diamondbacks a solid package in return. The seven-year veteran owns a career-worst 5.15 ERA in 14 starts in 2025.