 Darr was selected by the Baltimore Orioles in 4th round (96th overall) in the 1974 Major League Baseball Draft, but never played for them.He then was selected by Toronto Blue Jays in the 2nd round (17th overall) of the 1976 expansion draft.Darr appeared in just one game for the Blue Jays on September 6, 1977 at Exhibition Stadium against the Boston Red Sox.