Joseph William Kelly is an American professional baseball pitcher for the Boston Red Sox of Major League Baseball. He has served as both a starter and reliever. Kelly has also gained publicity for his comical repertoire, such as skillfully dancing in the outfield during practice, disguising himself while interviewing the unwitting rapper Nelly, and engaging in lengthy staredown with Los Angeles Dodgers outfielder Scott Van Slyke before a 2013 National League Championship Series game.