Jim Knowles returned most of an imposing Ohio State defense that ranked second nationally with 11.2 points per game allowed last season. There aren’t many questions facing the third-year Buckeyes coordinator about what his unit will look like in 2024. The starting 11 players could be penciled in right now without much debate. It’s the rest of the two-deep that creates some intrigue at this point — especially at the safety position, where Knowles was keying in last week ahead of the team’s second scrimmage of training camp. “It goes back to safety depth,” Knowles said, when asked about his bigg…