Reid Kristien Detmers (born July 8, 1999) is an American professional baseball pitcher for the Los Angeles Angels of Major League Baseball (MLB).
Detmers was born in Nokomis, Illinois and attended Nokomis High School as well as Glenwood High School, lettering in baseball for four seasons between the two schools. He played college baseball at the University of Louisville for three seasons, earning Atlantic Coast Conference and national accolades by his second season. By his junior year, Detmers was considered one of the top prospects for the MLB draft. He was selected tenth overall by the Angels in the first round of the 2020 draft and signed with the team, forgoing his final year of college eligibility.