Allen practiced with the second team for the third straight day Wednesday, Chris Brown of the Bills' official site reports.
It looks as though Allen is on track to see time with the second-team offense during Friday's exhibition against the Browns, but that doesn't mean he's passed AJ McCarron or Nathan Peterman in the battle for the top job. More likely, the Bills want to give the prized rookie a good test in the second preseason game, and preferred not to throw him out there without any prior familiarity with second team. Allen impressed while running the third unit in the preseason opener, so another good showing Friday would help his case for climbing the depth chart.