Greggory Olson (born October 11, 1966 in Scribner, Nebraska) is a former Major League Baseball relief pitcher who played with the Baltimore Orioles (1988–93), Atlanta Braves (1994), Cleveland Indians (1995), Kansas City Royals (1995, 1997), Detroit Tigers (1996), Houston Astros (1996), Minnesota Twins (1997), Arizona Diamondbacks (1998–99) and Los Angeles Dodgers (2000–01). Olson batted and threw right-handed.