FILE - In this Nov. 21, 2009 file photo, Ohio State running back Dan Herron (1) scores a touchdown on a 12-yard reception as the Michigan defense chases during the third quarter of an NCAA college football game in Ann Arbor, Mich. So you're the Big Ten or Pac-10 and you're trying to decide how to split your new, 12-team league into two divisions while keeping traditional rivalries intact and avoiding competitive imbalance and geographic oddities. The SEC, ACC and Big 12 have been through this before _ and their experiences may offer a few lessons. (AP Photo/Paul Sancya, File)
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