Jason Day will replace Chris Leben, who as we reported is to be jailed for 35 days for a probation violation, at UFC 85. Day, with a record of 17-5, faces an uphill battle when he takes on Michael Bisping, who boasts an impressive 15-1 fight record. Day debuted for UFC last month at UFC 83, besting Alan Blecher by TKO, and has chance to further prove himself when the UFC hits the UK on June 7th.