Former Peterborough United manager backed to take over at League One rivals
McCann has been backed from 8-1 to 11-4 second favourite in the last couple of days. Former Liverpool striker Robbie Fowler is the 5-2 favourite with BetVictor.
Oxford sacked Karl Robinson at the weekend after a run of one point from eight League One matches.
McCann was dismissed by Posh early in January after overseeing a run of one win in eight matches in all competitions.