Glitch player called UNDEFINED in lineup makes team invalid in MUT

I sold my ROLB 1 today, and when I went to put a different player in the lineup, the game froze there as it kept trying to load all the available players but never did. The only way out is to go to xbox 360 home. I added a rolb to the lineup by going to my item binder and doing it that way, which worked, but it slid this UNDEFINED player to rolb 2. Any attempt to put another player there freezes my game, and trying to remove him from the position or lineup kicks me out of Madden Ultimate team and the error screen pops up. Instead of showing 'not required' the spot is pure black, or it has shown in huge white letters J.J. WATT or D. WARE in all caps with not picture. Any attempt to remove them also shows them as undefined and boots me from MUT or freezes my game. Been this way for 8 hours now and cleaning the disc, unplugging and restarting my 360, and trying to remove and replace the player have al been failures, and now I am locked out of playing Madden Ultimate team due to this UNDEFINED rolb