Cavaliers head coach J.B. Bickerstaff to miss Wednesday's game for personal reasons; Greg Buckner to fill role | CBS Sports Headlines Cavaliers head coach J.B. Bickerstaff to miss Wednesday's game for personal reasons; Greg Buckner to fill role Cleveland says Bickerstaff is expected to rejoin the team for Friday’s game … Continue reading Cavaliers head coach J.B. Bickerstaff to miss Wednesday's game for personal reasons; Greg Buckner to fill role