Gregory Joseph Colbrunn is an American former Major League baseball player and hitting coach. Primarily a first baseman during his active career, the Fontana, California, native played in the Major Leagues for 13 seasons (1992–2004) and seven different teams. He threw and batted right-handed and was listed at 6 feet (1.8 m) tall and 190 pounds (86 kg). He served as the Boston Red Sox hitting coach during the 2013 and 2014 seasons.