Guardians prospect Parker Messick shined in his MLB debut on the mound, but the Cleveland bullpen let him down in an extra-inning loss.

The Cleveland Guardians had opportunities, but couldn't capitalize in their series loss to the Arizona Diamondbacks.

Cleveland Guardians newly promoted left-handed starter, Parker Messick had an outstanding debut against the Arizona Diamondbacks.

CJ Kayfus and Brayan Rocchio homered, Gavin Williams pitched 5⅓ scoreless innings and the Cleveland Guardians beat the Arizona Diamondbacks Aug. 18.

Parker Messick can finally say that he’s a big-league pitcher! The 24-year-old made his Cleveland Guardians and MLB debut on Wednesday afternoon against the Arizona Diamondbacks.

The Cleveland Guardians might have little to play for in 2025, but rookie starting pitcher Parker Messick's first major league start offered a promising glimpse into their future.

The Guardians provided a progress report on many prospects, including Travis Bazzana and Chase DeLauter, who has resumed baseball activity amid rehab.

The Guardians have been one of MLB’s hottest teams over the last few weeks, primarily because of the offense. Cleveland had a team slash line of 251/.326/.421 from the All-Star Break heading into their series against the Braves.

Lourdes Gurriel Jr's two-run single in the seventh lifted Arizona to the win and sent Cleveland to its fourth loss in five games.