Allen (elbow) is listed as questionable for Sunday's game against the Vikings after being deemed a limited practice participant Friday, Chris Brown of the Bills' official site reports.
According to Brown, Allen wasn't on the field for the media-access portion of Friday's practice, but the quarterback evidently got in some work behind the scenes. At this stage, Allen's Week 10 availability is up in the air, with head coach Sean McDermott telling Alaina Getzenberg of ESPN.com earlier Friday that the signal-caller's status is being viewed as an "hour-to-hour situation." With that in mind, Allen is shaping up as a game-day call ahead of Sunday's 1 p.m. ET kickoff. If Allen is unable to play versus Minnesota, backup Case Keenum would be in line to draw the start for Buffalo.