Dave Leiper was a left-handed pitcher who played in the Major League Baseball (MLB) for several teams during his career. He was born on July 19, 1963, in Whittier, California, and attended the University of California, Los Angeles (UCLA), where he played college baseball.

Leiper was drafted by the Milwaukee Brewers in the 10th round of the 1984 MLB draft. He made his MLB debut with the Brewers on September 1, 1987, and pitched in four games that season. In 1988, he appeared in 22 games for the Brewers, starting six of them, and had a 4-3 record with a 4.50 earned run average (ERA).

After spending the 1989 season in the minor leagues, Leiper was traded to the Cleveland Indians in December of that year. He pitched in 12 games for the Indians in 1990, starting five of them, and had a 2-2 record with a 4.50 ERA. He spent most of the 1991 season in the minor leagues but was called up to the Indians in September and pitched in two games.

Leiper signed with the San Francisco Giants as a free agent in December 1991. He spent most of the 1992 season in the minor leagues but was called up to the Giants in September and pitched in two games. He pitched in 12 games for the Giants in 1993, starting four of them, and had a 1-2 record with a 5.40 ERA.

Leiper signed with the Detroit Tigers as a free agent in December 1993. He pitched in 13 games for the Tigers in 1994, starting six of them, and had a 2-3 record with a 5.40 ERA. He pitched in 16 games for the Tigers in 1995, starting four of them, and had a 1-2 record with a 5.40 ERA.

Leiper signed with the Pittsburgh Pirates as a free agent in December 1995. He pitched in 16 games for the Pirates in 1996, starting four of them, and had a 1-2 record with a 5.40 ERA. He was released by the Pirates in August 1996 and did not pitch in the MLB again.

In his MLB career, Leiper had a 11-14 record with a 4.92 ERA in 95 games, including 34 starts. He struck out 122 batters and walked 87 in 230 innings pitched.

After his playing career, Leiper became a pitching coach in the minor leagues. He was the pitching coach for several teams, including the Brevard County Manatees, the Huntsville Stars, the Nashville Sounds, and the Biloxi Shuckers. He was also a roving pitching instructor for the Milwaukee Brewers.