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Scouting Report
Updated May 19, 2026
Zac Gallen is struggling significantly in 2026 after re-signing with the Diamondbacks on a one-year deal. Through 9 starts, he has a 1-4 record with a 5.65 ERA, 1.52 WHIP, and is allowing a .302 batting average with 11 extra-base hits. He has failed to record a quality start since April 1 and has been inconsistent, with poor performances against the Rangers (7 ER in 4.2 IP) and Pirates (4 ER in 6 IP), though he showed some improvement against the Giants with a quality start. May has been particularly brutal with a 10.67 ERA over 3 starts. He is being discussed as a potential trade candidate ahead of the deadline due to his poor performance and upcoming free agency.
Strengths
- + Showed improvement against Giants with quality start
- + Drew season-high 15 whiffs against Pirates with effective slider
- + Slider has become more effective than his traditional curveball
- + Career workhorse with ability to eat innings
- + Ranked 3rd in MLB in innings pitched over past 4 seasons
- + Franchise history contributor with 1,003.1 innings for Diamondbacks
- + Able to stay healthy throughout career
About
Zac Gallen is a sp for the Arizona Diamondbacks.
Player Overview
SP
Arizona Diamondbacks
Recent News
Zac Gallen threw six innings of two-run baseball to get a win over the Giants on Monday.
May 19, 2026
How to watch San Francisco Giants vs. Arizona Diamondbacks
May 18, 2026
Ildemaro Vargas' hitting streak reaches 25 games for Diamondbacks - Arizona Sports
May 17, 2026
Zac Gallen allowed seven runs with four strikeouts over 4 2/3 innings in a loss against the Rangers on Tuesday.
May 12, 2026
Ezequiel Duran went 2-for-3 with a home run, three runs scored, and two RBI to lead the Rangers to a 7-4 win over the Diamondbacks on Tuesday.
May 12, 2026