Reginald Allen Harris (born August 12, 1968) is an American former professional baseball middle relief pitcher, who played in Major League Baseball (MLB) for the Oakland Athletics (1990–91), Boston Red Sox (1996), Philadelphia Phillies (1997), Houston Astros (1998), and Milwaukee Brewers (1999). He was drafted in the first round (26th overall) in the 1987 Major League Baseball draft. Listed at 6 ft, 180 lb, Harris batted and threw right-handed. In a six-season career, Harris posted a 2–3 record with a 4.91 earned run average in 86 appearances, including 95 strikeouts, 81 walks, 28 games finished, and 121.0 innings of work. He was not credited with a save. In 2015, Harris was hired as pitching coach for the Sussex County Miners but left the team in early July. As of 2018, he served as the pitching coach of the indy league Chicago Dogs. In 2021, Harris was hired as pitching coach for the Gastonia Honey Hunters of the Atlantic League of Professional Baseball. He returned for the 2022 season. In 2023, Harris moved to the Staten Island FerryHawks of the Atlantic League of Professional Baseball to serve as their pitching coach.