Hot Board: Potential candidates to replace Bill O'Brien as next Buckeyes offensive coordinatorby:Spencer Holbrook•02/09/24•SpencerHolbrookRead In AppOhio State's Ryan Day holds the offensive play sheet during a 30-24 loss at Michigan. (Matt Parker/Lettermen Row)Lettermen Row is breaking down candidates to replace Bill O'Brien as the Ohio State Buckeyes new play caller.