Ovinton J’Anthony “O. J.” Mayo (born November 5, 1987) is an American professional basketball player. He played one season of college basketball for the USC Trojans while earning first-team All-Pac-10 honors. The team forfeited all of its wins that season and Mayo lost his remaining three years of National Collegiate Athletic Association (NCAA) eligibility after it was ruled he received improper benefits. Mayo entered the 2008 NBA draft and was selected by the Minnesota Timberwolves with the third overall pick. He was later traded to the Memphis Grizzlies, with whom he played four seasons. In 2011, he tested positive for a banned steroid and was suspended by the NBA for 10 games. Mayo signed with the Dallas Mavericks in 2012, and then with the Milwaukee Bucks in 2013.
Mayo had given Kansas State a soft verbal commitment to play for them, but retracted it when head coach Bob Huggins announced he would take the same position at West Virginia. Frank Martin, by whom Mayo was recruited, was named head coach. Former teammate at North College Hill High School Bill Walker opted to stay and play for Martin.
Mayo enrolled at the University of Southern California in the summer of 2007, taking two classes. While waiting for the season to begin, he played pickup basketball against NBA players such as Kobe Bryant, Sam Cassell, Kevin Garnett, Mike Dunleavy, Jr., D. J. Augustin, Jason Kidd, Adam Morrison, and J. J. Redick.
Mayo earned All-Pac-10 first team honors. In the 2008 Pacific-10 Conference Men’s Basketball Tournament, the Trojans lost to UCLA, featuring Kevin Love and Russell Westbrook, in the semi-finals. Both Mayo and Love were selected to the All-Pac-10 tournament team. In his NCAA Tournament debut with the Trojans, Mayo scored 20 points as USC was beaten by Kansas State and freshman Michael Beasley and old high school teammate Bill Walker.