Black said he takes prescribe medicine for a medical condition and he followed the proper steps to clear his use with the NFL.
“At no point in my football career have I used a drug to gain a competitive edge,” Black said by phone. “That’s not something I would do. I think if any person with common sense were to examine me physically and knew me knows that that’s not the case at all.
On Monday, Black was suspended four games for "violating the NFL policy on performance enhancing substances."
If the Redskins make the playoffs, he would not be able to play in the Wild-Card round. Black has already lost his appeal with the league.
On Sunday, in a 38-21 victory over the Cleveland Browns, the nine-year veteran served as a backup and replaced starting right tackle Tyler Polumbus in the second half after he suffered a concussion.