Coach Sean McDermott would only list the Bills' top offensive threat as day to day and declined to say whether McCoy would be able to practice at all this week. McCoy was scheduled to address reporters after practice.
McCoy was carted off the field after being hurt on the opening drive of the second half of Buffalo's 22-16 win at Miami on Sunday.
The win coupled with Baltimore's 31-27 loss to Cincinnati clinched Buffalo's first playoff berth since the 1999 season. As the AFC's sixth seed, the Bills (9-7) will face South Division champion Jacksonville (10-6) in a wild-card game.
McCoy leads Buffalo with 1,138 yards rushing, 59 catches and eight touchdowns, including two receiving.
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