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Diamondbacks Weigh Trading Struggling Ace Zac Gallen

Arizona’s losing record and Gallen’s season-high ERA have positioned their veteran starter as a sought-after rental for teams chasing October

LOS ANGELES, CALIFORNIA - OCTOBER 09: Zac Gallen #23 of the Arizona Diamondbacks reacts after striking out Freddie Freeman #5 of the Los Angeles Dodgers to end the fifth inning in Game Two of the Division Series at Dodger Stadium on October 09, 2023 in Los Angeles, California.
PHOENIX, ARIZONA - MAY 17: Starting pitcher Zac Gallen #23 of the Arizona Diamondbacks reacts after giving up a home run to Hunter Goodman #15 of the Colorado Rockies during the first inning of the MLB game at Chase Field on May 17, 2025 in Phoenix, Arizona.
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Overview

  • The Diamondbacks have fallen to 29-31, sitting fourth in the NL West and five games behind the wild card cutoff.
  • Gallen has posted a 3-7 record with a 5.13 ERA and 32 walks over 13 starts while his fastball velocity has dipped.
  • The Chicago Cubs have identified Gallen as their top trade target to reinforce a rotation depleted by injuries.
  • The New York Yankees are monitoring Gallen to add depth behind Max Fried once Luis Gil returns from injury.
  • Gallen’s impending free agency after 2025 makes him an attractive half-season rental for playoff contenders.