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Arizona Diamondbacks · Pitcher
At 30 years old, Gallen enters 2026 as a proven innings-eater and strikeout source for Arizona, though his early-season numbers raise significant concerns after a down 2025 campaign. His All-MLB and All-Star credentials from 2023 remain relevant, but the sharp decline in ERA (4.83 to 6.15) and jump in WHIP (1.26 to 1.58) through his first handful of starts suggest he's lost command and effectiveness—red flags that could persist if mechanical or health issues aren't resolved. Strikeout production remains his calling card with 52 Ks already, but wins and ERA categories appear highly risky at current performance levels. Fantasy managers should approach Gallen cautiously, waiting for evidence of adjustment before investing heavily, or pivot to more consistent rotation options.
Zac Gallen begins rehab assignment at Triple-A
Arizona Diamondbacks pitcher Zac Gallen, recovering from an elbow injury, is set to begin his rehab assignment at Triple-A Reno on Sunday. This marks an important step toward his return to the majors as the team nears the final month of the season. His return timeline will depend on his performance during the minor league stint.
Aug 29, 2026
Zac Gallen Seeks Second Opinion on Elbow Injury
Arizona Diamondbacks pitcher Zac Gallen is awaiting a second opinion on his injured right elbow, according to manager Torey Lovullo. This represents a significant concern for the team's rotation and Gallen's fantasy value moving forward. The severity and timeline of his return remain unclear pending the specialist evaluation.
Jul 17, 2026
Zac Gallen takes fourth straight loss for Diamondbacks
Arizona Diamondbacks pitcher Zac Gallen fell to 3-9 after taking the loss against San Diego on July 7, allowing four runs on six hits and three walks with five strikeouts over six innings. Gallen's continued struggles extend his losing streak to four consecutive starts, making him a risky fantasy start going forward.
Jul 8, 2026
| Year | Team | G | GS | W | L | SV | ERA | WHIP | K | IP | BB |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2019 | 2 teams▼ | 15 | 15 | 3 | 6 | 0 | 2.81 | 1.23 | 96 | 80.0 | 36 |
| 2020 | Arizona Diamondbacks | 12 | 12 | 3 | 2 | 0 | 2.75 | 1.11 | 82 | 72.0 | 25 |
| 2021 | Arizona Diamondbacks | 23 | 23 | 4 | 10 | 0 | 4.30 | 1.29 | 139 | 121.1 | 49 |
| 2022 | Arizona Diamondbacks | 31 | 31 | 12 | 4 | 0 | 2.54 | 0.91 | 192 | 184.0 | 47 |
| 2023 | Arizona Diamondbacks | 34 | 34 | 17 | 9 | 0 | 3.47 | 1.12 | 220 | 210.0 | 47 |
| 2024 | Arizona Diamondbacks | 28 | 28 | 14 | 6 | 0 | 3.65 | 1.26 | 156 | 148.0 | 54 |
| 2025 | Arizona Diamondbacks | 33 | 33 | 13 | 15 | 0 | 4.83 | 1.26 | 175 | 192.0 | 66 |
| 2026 | Arizona Diamondbacks | 19 | 19 | 3 | 9 | 0 | 6.34 | 1.56 | 61 | 98.0 | 31 |
| Career | Totals | 195 | 195 | 69 | 61 | 0 | 3.83 | 1.19 | 1121 | 1105.1 | 355 |
Source: MLB Stats API · Multi-team seasons show combined totals — click to expand
| Year | Team | G | GS | W | L | SV | ERA | WHIP | K | IP | BB |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2016 | GCL Cardinals | 6 | 3 | 0 | 0 | 1 | 1.86 | 0.72 | 15 | 9.2 | 0 |
| 2017 | 2 teams▼ | 13 | 13 | 4 | 5 | 0 | 3.79 | 1.33 | 42 | 71.1 | 19 |
| 2018 | New Orleans Baby Cakes | 25 | 25 | 8 | 9 | 0 | 3.65 | 1.47 | 136 | 133.1 | 48 |
| 2019 | New Orleans Baby Cakes | 14 | 14 | 9 | 1 | 0 | 1.77 | 0.71 | 112 | 91.1 | 17 |
| 2026 | Reno Aces | 1 | 1 | 0 | 0 | 0 | 0.00 | 1.80 | 2 | 1.2 | 2 |
| Career | Totals | 59 | 56 | 23 | 13 | 1 | 2.65 | 1.12 | 344 | 312.1 | 83 |
Source: MLB Stats API · Multi-team seasons show combined totals — click to expand