On 28 September 1995, he became the first major leaguer to pitch as a leftie and rightie in the same game since Elton "Ice Box" Chamberlain of the American Association in 1888.
Four years after he left the San Diego Padres, the team had another pitcher named Greg Harris.
Pitcher with the New York Mets (1981), Cincinnati Reds (1982), Montréal Expos (1984; 1995), San Diego Padres (1984), Texas Rangers (1985-1987), Philadelphia Phillies (1988-1989), Boston Red Sox (1989-1994), and New York Yankees (1994).
Made major league debut 20 May 1981.
Pitched in final major league game 29 September 1995.