2025 Stats
W-L
1-3
ERA
5.60
WHIP
1.43
K
29
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

Hit hard by Cubbies
Gallen (1-3) took the loss Saturday, coughing up six runs on seven hits and two walks over six innings as the Diamondbacks fell 6-2 to the Cubs. He struck out five.
ANALYSIS
Four of the hits off Gallen went for extra bases, including back-to-back homers by Seiya Suzuki and Michael Busch in the second inning. The right-hander has been tagged for at least four runs in three of his first five starts this season, leaving him with a 5.60 ERA, 1.43 WHIP and 29:13 K:BB through 27.1 innings. Gallen will look to rebound in his next outing, which is scheduled to come at home next weekend against Atlanta.
Four of the hits off Gallen went for extra bases, including back-to-back homers by Seiya Suzuki and Michael Busch in the second inning. The right-hander has been tagged for at least four runs in three of his first five starts this season, leaving him with a 5.60 ERA, 1.43 WHIP and 29:13 K:BB through 27.1 innings. Gallen will look to rebound in his next outing, which is scheduled to come at home next weekend against Atlanta.
Pitching Stats
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2024
2023
2022
2021
2020
2019
Minor League Game Log

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Pitching Appearances Breakdown
Average Pitch Count
94
Last 10 Games
94
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
-2%
BAA vs RHP
2025
-48%
BAA vs RHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2023vs Left | .241 | 198 | 59 | 172 | 24 | |||
Since 2023vs Right | .235 | 207 | 55 | 175 | 16 | |||
2025vs Left | .310 | 15 | 8 | 18 | 3 | |||
2025vs Right | .160 | 14 | 5 | 8 | 2 | |||
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
-26%
ERA at Home
2025
-37%
ERA on Road
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2023Home | 3.16 | 1.16 | 199.2 | 10.0 | 2.4 | ||||
Since 2023Away | 4.27 | 1.24 | 185.2 | 8.9 | 2.9 | ||||
2025Home | 6.75 | 1.84 | 14.2 | 6.8 | 6.8 | ||||
2025Away | 4.26 | 0.95 | 12.2 | 12.8 | 1.4 | ||||
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
2.23K/9
9.5BB/9
4.3HR/9
1.6Fastball
92.9 mphERA
5.60WHIP
1.43BABIP
.304GB/FB
0.73Left On Base
68.8%Exit Velocity
84.2 mphBarrels/BBE
7.9%Spin Rate
2230 rpmBalls Hit 95+ MPH
28.6%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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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

Quality start in no-decision
Gallen took a no-decision Sunday against the Brewers. He struck out five over six innings while allowing two runs on five hits and three walks.
ANALYSIS
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Struggles with control vs. Orioles
Gallen (1-2) allowed five runs on seven hits and four walks while striking out two batters over 4.2 innings in a loss to Baltimore on Monday.
ANALYSIS
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Dominates Yankees with 13 punchouts
Gallen (1-1) earned the win over the Yankees on Wednesday, racking up 13 strikeouts without issuing a walk while allowing three hits over 6.2 scoreless innings.
ANALYSIS
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Allows four runs in opener
Gallen (0-1) took the loss Thursday against the Cubs after giving up four runs on four hits and four walks over four innings. He struck out four.
ANALYSIS
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Makes final spring start
Gallen allowed one run on five hits and two walks while striking out two over 4.1 innings in Thursday's spring start against the Athletics.
ANALYSIS
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Latest Fantasy Rumors

Potential trade chip
The Diamondbacks might consider trading Gallen this offseason, Will Sammon and Patrick Mooney of The Athletic report.
ANALYSIS
Multiple clubs looking for rotation help reached out to the Diamondbacks at this week's general managers' meetings. While it's not clear which of their arms has drawn the most interest, Gallen, Merrill Kelly and Jordan Montgomery will all be free agents following the 2025 season. It would be difficult for Arizona to part with their best starter in Gallen since they want to be competitive next season, but he would also likely bring the best return.
Multiple clubs looking for rotation help reached out to the Diamondbacks at this week's general managers' meetings. While it's not clear which of their arms has drawn the most interest, Gallen, Merrill Kelly and Jordan Montgomery will all be free agents following the 2025 season. It would be difficult for Arizona to part with their best starter in Gallen since they want to be competitive next season, but he would also likely bring the best return.