Nicholas Tomas Leyva (born August 16, 1953) is an American former professional baseball player, coach, and manager. After his retirement as a Minor League Baseball (MiLB) player, Leyva moved into coaching. His Major League Baseball (MLB) coaching stops included the St. Louis Cardinals, Toronto Blue Jays (on two occasions), Milwaukee Brewers, and Pittsburgh Pirates. Leyva was the manager of the Philadelphia Phillies from 1989 though early 1991.