Declan Evans Cronin is an American professional baseball pitcher.
Cronin was drafted by the Chicago White Sox in the 36th round, with the 1,070th overall selection, of the 2019 Major League Baseball draft.
On July 28, 2023, Cronin was selected to the 40-man roster and promoted to the major leagues for the first time. In 9 appearances for Chicago in his debut campaign, he allowed 11 runs on 11 hits and 7 walks with 8 strikeouts. On December 28, Cronin was designated for assignment.
On January 4, 2024, Cronin was claimed off waivers by the Houston Astros. He was designated for assignment on January 31, following the waiver claim of Trey Cabbage. He was then claimed by the Miami Marlins on February 7.