Oscar Marin

Oscar Marin (born December 5, 1982) is an American professional baseball coach who currently serves as the bullpen coach for the Cincinnati Reds of Major League Baseball (MLB). He has previously coached in MLB for the Texas Rangers and Pittsburgh Pirates.

Playing career Marin graduated from Chatsworth High School in Chatsworth, California. Marin played for Los Angeles Valley College for two seasons (2001–2002). He then pitched for two seasons (2003–2004) at the University of Arkansas-Little Rock.

Coaching career Amateur Marin started his coaching career in 2005 as an assistant coach for the University of Arkansas-Little Rock baseball team. From 2014 to 2015, he served as pitching coach of the Hickory Crawdads of the Single-A South Atlantic League. In 2016, Marin was the pitching coach of the High Desert Mavericks of the High-A California League.

Seattle Mariners Marin left the Rangers organization and was the minor league pitching coordinator for the Seattle Mariners in 2017 and 2018.

Texas Rangers (second stint) Marin rejoined the Texas Rangers organization, for the first time on a major league staff, serving as their bullpen coach for the 2019 season.

Pittsburgh Pirates On December 17, 2019, Marin was hired by the Pittsburgh Pirates as their pitching coach. On September 30, 2025, the Pirates parted ways with Marin.

Cincinnati Reds On November 13, 2025, the Cincinnati Reds hired Marin to serve as their bullpen coach.

Awards Marin was named the South Atlantic League Coach of the Year for the 2015 season.