Papadakis's family has long-held ties to
University of Southern California (USC) sports. His father, John (Yiannis), and his brother, Taso, both played football at USC. His maternal grandfather, Dr. Ernest Schultz, played
basketball for the Trojans. In spite of the family's close ties to USC, his younger brother Demetrius walked on to crosstown rival
UCLA's football team and was a member of the 2008 team. Petros planned to play football for the UCLA Bruins, but the Bruins lost interest in recruiting him and canceled his visit to campus. Papadakis started his college career at the
University of California, Berkeley. He left the Cal Fall football training camp, undetected, in the middle of the night and hitchhiked back to
Los Angeles after being homesick after one week. While playing for USC, Papadakis scored 16
touchdowns. In 1999 and 2000, he was named USC's team captain. However, he
broke his foot in August 1999, requiring several
operations that caused him to miss that season. After months of
rehabilitation, Papadakis returned in 2000. His teammates honored this accomplishment, voting Papadakis that season's "Most Inspirational Player." In the
2000 season, USC won its opening game against
Penn State in the
Kickoff Classic with a score of 29–5 at the
Meadowlands. Playing on his repaired foot, Papadakis scored a
touchdown and gained 29 yards on 11
carries. The Trojans began the season 3–0 and were ranked 8th in the national polls. But the team collapsed and finished with a 5–7 overall record. The Trojans 2–6 conference record in 2000 was the only time the team finished in the last league position. Since his first year in broadcasting, Papadakis has regularly called himself "the captain of the worst team in USC history". During his university football career, Papadakis played in the 1998
Sun Bowl, where the team lost to
Texas Christian University, scoring a touchdown during this game. Papadakis's first experience of broadcasting occurred when he was a tailback for the USC football team, where he became a popular interviewee among
media in Los Angeles. When questioned about his popularity, Papadakis replied, "I just feel like the media is starved for somebody to say something different than, 'We really have to play hard this week.' That’s all good stuff, but I deal with that in meetings every day. I deal with that for six hours with coaches." ==Television and movie career==