David Paul Leiper (born June 18, 1962) is an American former professional baseball pitcher.^[1] He played in Major League Baseball (MLB) for the Oakland Athletics (1984, 1986–87 and 1994–95), San Diego Padres (1987–89), Montreal Expos (1995 and 1996), and Philadelphia Phillies (1996).

In 8 seasons he had a win–loss record of 12–8 in 264 games, 65 games finished, 7 saves, 278 innings pitched, 282 hits allowed, 141 runs allowed, 123 earned runs allowed, 25 home runs allowed, 114 walks, 150 strikeouts, 12 wild pitches, 17 intentional walks, 3 balks, 3.98 ERA and a WHIP of 1.424.