Jeffrey Scott Darwin (born July 6, 1969) is an American former professional baseball pitcher. He played for three seasons at the Major League Baseball (MLB) for the Seattle Mariners and Chicago White Sox. He was drafted by the Mariners in the 13th round of the 1988 Major League Baseball draft. Darwin played his first professional season with the Low-A Bellingham Mariners in 1989, and his last season with the San Diego Padres' Triple-A team, the Las Vegas Stars, in 1999. He is the brother of pitcher Danny Darwin.