Butler's Chris Holtmann has emerged as the leading candidate to become Ohio State's next head coach, a source told CBS Sports on Thursday. An announcement could come as early as Friday. Holtmann spent the past three years at Butler and led the Bulldogs to three straight NCAA Tournament appearances. He won four NCAA Tournament games in those three seasons and advanced to the Sweet 16 this past March. So Ohio State's search to replace Thad Matta -- who was removed Monday in a surprising development -- might end up lasting just four or five days. But it was a wild four or five days that saw a list of possible candidates start with Arizona's Sean Miller, Indiana's Archie Miller, Xavier's Chris Mack and Oklahoma City's Billy Donovan dwindle to Chicago's Fred Hoiberg and Creighton's Greg McDermott -- both of whom publicly removed themselves from consideration within 24 hours of each other.