Pedro Antonio Liriano (born October 23, 1980) is a former professional baseball starting pitcher. He played in Major League Baseball for the Milwaukee Brewers (2004) and Philadelphia Phillies (2005).
In 2006, Liriano played for the San Francisco Giants' Triple-A affiliate, the Fresno Grizzlies. In 2007, he played for the Los Angeles Angels of Anaheim's Triple-A affiliate, the Salt Lake Bees. In 28 games (25 starts), he was 4–12 with a 5.59 ERA and 67 strikeouts. Liriano played for the Tecolotes de Nuevo Laredo of the Mexican League in 2010. He last played in 2014, in the independent Atlantic League.