Declan Cronin Stats & Bio | Marlins Pitcher

About Declan Cronin

Declan Cronin is a right-handed pitcher for the Miami Marlins, wearing #51 on the mound. Standing at an imposing 6'4" and 225 pounds, the New Jersey native brings a commanding presence to the bullpen. Born in Glen Ridge in 1997, Cronin developed his pitching prowess at Holy Cross, where he established himself as a collegiate standout before entering professional baseball. Cronin's journey to the Marlins showcases his persistence and dedication to perfecting his craft. With a powerful frame that generates significant velocity, he challenges hitters with a mix of pitches that keep batters off balance. His northeast upbringing instilled the toughness needed to compete at baseball's highest level. As he continues to develop with Miami, Cronin represents both his New Jersey roots and Holy Cross alma mater proudly while working to carve out his role in the major leagues.

Updated: Feb 19, 2026