Matthew Stephen Leinart, born May 11, 1983, is an American former professional football quarterback. He attended the University of Southern California, playing for the USC Trojans football team from 2001 to 2005. As a junior in 2004, Leinart won the Heisman Trophy and led the USC Trojans to the BCS national championship. He was inducted into the College Football Hall of Fame in 2017.

Leinart was selected 10th overall by the Arizona Cardinals in the first round of the 2006 NFL draft.