Stevenson Nathaniel Garrison (born September 12, 1986) is an American former professional baseball pitcher.

[2] Garrison was selected by the Milwaukee Brewers in the 10th round (295th overall) of the 2005 Major League Baseball Draft.

[5] Garrison made his major league debut on July 25, 2011, against the Seattle Mariners, recording the last 2 outs in a 10–3 Yankees win.

He signed a minor league contract with the Arizona Diamondbacks in December 2012 and with the Baltimore Orioles in February 2014.

[8] Garrison played with the Long Island Ducks for part of the 2014 season before being released.