Roberson was a standout receiver/defensive back for the Spartans during the 1990-91 seasons. As a Junior in 1990, Roberson caught 16 passes for 222 yards and 2 TDs, while also returning an interception for a touchdown. Roberson was named 1st team All-Valley Pac-8 conference as a junior. As a senior in 1991, Roberson recorded 28 receptions for 464 yards and 5 TDs. His total of 15 touchdowns included a record setting performance against Van Nuys, as he scored touchdowns four different ways: 29 yard reception, 30 yard run, 82 yard punt return, and a 98 yard interception return.