Some went on to have long careers, while others had brief and mostly forgettable careers or were never picked at all. Only 16 quarterbacks have ever participated in an NFL game out of the nearly 500 USC players who have gone on to play in the league. Here are their names. USC has had more than its share of quarterback controversy. In addition to Barkley, Matt Leinart and Aaron Rodgers (not to mention Mark Sanchez) all saw time under center during their years with the Trojans. Several other quarterbacks have also been drafted over the years, but only two have ever started an NFL game: Carson Palmer and Matt Leinart. Palmer spent his first six seasons with the Cincinnati Bengals before being traded to the Raiders for a second-round pick in 2014. He's now one victory away from tying Joe Montana for most victories by a Notre Dame quarterback. Leinart is 1-3 as a starter after replacing Palmer last season. He was drafted second overall by the Arizona Cardinals in 2009 and went on to win the Heisman Trophy that year. There have been so many quality quarterbacks at USC that it's hard to name any single one above the rest. However, if we had to choose one, it would be Barkley. Not only was he the best player on some of the greatest teams in Trojan history, but he also led his team to the playoffs every year he was in school.