Pics sent to me by colemcgarvey on IG from Bills website, Allen appears to have a knee inj based on bracing under the pants on R leg.

Explains why you see more sock on R>L. Based on video, may have suffered a MCL sprain. Didn’t limit him much today #BillsMafia pic.twitter.com/EDpCYkaXkZ

— Banged Up Bills (@BangedUpBills) November 29, 2020