Ranking the all-time best USC Trojans teams

Clay Helton has led USC back into the national conversation. Jayne Kamin-Oncea/USA Today Sports

Clay Helton's 2016 USC Trojans team notched the program's first top-three finish in the final Associated Press poll since the 2008 season.

That team's lack of a conference title or national championship precludes it from being listed among the best USC teams. But that leads to the question: What are the greatest Trojans teams of all time?