In 1999, Coolbaugh played for the Triple-A Tucson Sidewinders and also was a player–coach for Double-A El Paso. In 2000, he was the manager of the High Desert Mavericks, and in 2001, he was the manager of the Lancaster JetHawks. In 2002, he was again the hitting coach for El Paso. Coolbaugh served as El Paso's manager from 2003–2004. From 2007–2008, he was the hitting coach for Double-A Frisco in the Rangers' organization. On December 29, 2008, he was named the hitting coach for the Triple-A Oklahoma City RedHawks.[5] On June 8, 2011, the Texas Rangers brought him in from their Triple-A affiliate, Round Rock, to replace hitting coach Thad Bosley.[6][7]
On October 19, 2012, Coolbaugh was replaced as hitting coach by Dave Magadan. He was offered another job within the organization.[8] Coolbaugh served as hitting coach for the Baltimore Orioles from 2015 through 2018. He then served as hitting coach for the Oklahoma City Dodgers in 2019.[9] Coolbaugh was hired by the Chicago White Sox as their assistant hitting coach prior to the 2020 season.[10]
On November 7, 2020, Coolbaugh was named hitting coach for the Detroit Tigers, a position he served in until being dismissed following the 2022 season.[11]
On January 17, 2023, the San Diego Padres hired Coolbaugh as their assistant hitting coach.[12]
Personal
Coolbaugh is the brother of the late major league player and minor league coach Mike Coolbaugh, who was killed when he was struck on the left side of his neck below the ear by a line drive while serving as the first base coach for the Tulsa Drillers.[13]