A 20-year-old woman testified Thursday that Robertson raped her at her off-campus apartment in April. The defensive end from Fort Wayne, Indiana, was kicked off the team after he was charged.
The woman said her boyfriend, a football player, told a coach, who notified police.
Defense attorney David Rosenberg told the Lansing State Journal that it's a "weak case." The 19-year-old Robertson next hopes to play football at a Mississippi community college.
Three other former players face sexual assault charges in an unrelated case. They also were kicked off the football team.