Rob Ryan (born June 24, 1973) is a former outfielder in Major League Baseball who played for the Arizona Diamondbacks and the Oakland Athletics. He attended Washington State University where he played college baseball for the Cougars from 1993–1996, and was drafted by the Diamondbacks in the 26th round (785th overall pick) of the 1996 Major League Baseball Draft. He signed with the Diamondbacks two days later on June 6. Ryan, who batted and threw left-handed, was listed at 5' 11" in height, and 192 lb in weight.