Per KFFL: NFL | Keenan Allen has drug red flag Tue, 16 Apr 2013 08:22:56 -0700 California WR Keenan Allen was red flagged for a drug test at the NFL Scouting Combine. His agent has denied that Allen failed a test, but results are unknown. -- Potential draft shake-up when it comes to the order in which WRs are selected.