David Alexander Liddell (born June 15, 1966 in Los Angeles) is a former Major League Baseball catcher. He caught one game for the New York Mets in 1990. He hit a single in his only Major League at bat, on June 3, 1990, giving him a lifetime batting average of 1.000. His Major League slugging percentage and on-base percentage are also 1.000. His at bat came in the 8th inning of a game against the Philadelphia Phillies as a pinch hitter for Mets' catcher Mackey Sasser against pitcher Pat Combs. His hit came on the only Major League pitch he ever faced; author George Rose estimates that his Major League career as a hitter thus lasted only about 20 seconds. He scored a run later in the inning. He also caught one inning with one putout for a lifetime fielding percentage of 1.000.