Ohio State coach Ryan Day explains why he is calling offensive plays instead of Brian Hartline vs. Miami. (1:02)Open Extended ReactionsOhio State coach Ryan Day said he will take over calling offensive plays in the second-seeded Buckeyes' College Football Playoff opener on New Year's Eve against Miami. Ohio State offensive coordinator Brian Hartline, who called plays during the regular season, is balancing responsibilities, having recently taken the head coaching job at USF. Day added that Hartline will focus on coaching Ohio State's receivers in the CFP. As head coach, Day called Ohio State's offensive plays until last season, when he relinquished those duties to Chip Kelly.