Gallen has a career 3.12 ERA against the club that drafted him in St. Louis. His most recent start was a six-inning, seven strikeout shutout in 2024. RHP Miles Mikolas (3.77 ERA)

After Zac Gallen struggled during his last outing, Diamondbacks manager Torey Lovullo decided to switch things up.

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.

The Arizona Diamondbacks were unable to come away with the victory on Friday night, losing to the St. Louis Cardinals by a score of 4-3. It was a pitchers duel early on in Friday nights matchup on St.

Right-hander Zac Gallen has had two seasons so far in 2025. One season against New York teams, where he's allowed just two earned runs over 19.2 innings against

Arizona Diamondbacks starting pitcher Zac Gallen has been baffled by the worst early season struggle of his career.

MLB player prop bets and odds for Nolan James Arenado on Friday, May 23, 2025, as the St. Louis Cardinals take on the Arizona Diamondbacks.

The manager spoke about Justin Martinez's role upon his return, Zac Gallen and Jose Herrera pairing, and Jordan Lawlar's playing time

Arizona Diamondbacks pitcher Zac Gallen gave up six runs in five innings, tying a career worst with four home runs allowed.

The Diamondbacks' Zac Gallen had a shutout through five innings, but a three-run triple by the Cardinals' Nolan Arenado pushed St. Louis to victory.