Donald is the secondary villain of the 1996 film, Happy Gilmore. He was played by Joe Flaherty.
He is a man hired by Shooter McGavin to heckle Happy so that he will lose his temper and be kicked off the tour when he does so. He does this by calling Happy a jackass whenever Happy tries to hit the ball, which causes Happy to lose focus and play poorly. This annoys Happy's celebrity teammate, Bob Barker, who eventually begins to heckle Happy as well. This leads to a brawl between Happy and Barker (which Barker wins), but Happy is only suspended from the tour instead of being kicked off like Shooter had anticipated he would. Later in the movie, Shooter once again calls on Donald to assist him when Happy is beating him in a tournament. Donald hits Happy with his car before being taken away by the police.