Complex sentence: Hackett studied at the University of Southern California, playing college basketball since his freshman year, as the USC Trojans' point guard, with whom he played in the NCAA Tournament three times.
Split into simpler sentences: Hackett studied at the University of Southern California, where he played college basketball. Starting with his freshman year, he was the USC Trojans' point guard, and with the Trojans he played in the NCAA Tournament three times.