Paul Mainieri (born August 29, 1957) is a former baseball coach and second baseman. He played college baseball at LSU, Miami-Dade CC and New Orleans before pursuing a professional baseball career. He then served as the head coach of the St. Thomas Bobcats (1983–1988), the Air Force Falcons (1989–1994), the Notre Dame Fighting Irish (1995–2006) and the LSU Tigers (2007–2021). Mainieri coached LSU to the 2009 College World Series Championship.