COLUMBUS, Ohio >> The backup quarterback derby at Ohio State continues furiously in preseason camp without definitive word on whether Joe Burrow or Dwayne Haskins will be No. 2.The starting job is firmly held by J.T. Barrett, of course, but Burrow, Haskins and true freshman Tate Martell have battled throughout preseason camp for backup duty - and more importantly, to position themselves to start next year when Barrett is gone.