DENVER - Denver Broncos Pro Bowl linebacker Von Miller is facing a four-game suspension for violating the NFL's drug policy, The Denver Post reported Monday.
No details were available about which banned substances he is accused of taking.
Sources told 7SPORTS' Lionel Bienvenu that the case is currently in the appeals process.
The Denver Broncos are not commenting because it is a legal matter that has not been resolved, Bienvenu said.
The NFL is not commenting because of its strict confidentiality clause on such cases.
Miller tweeted a response from his @MillerLite40 account at 12:50 p.m. It said, "Seeing reports abt 4 game susp. I know I did nothing wrong. I'm sure this'll be resolved fairly. Disapp. Broncos have 2 open camp like this. [sic]"
Miller's father, Von Miller Sr. told the Denver Post Miller will have a statement regarding the NFL action later Monday.
Miller was the NFL's defensive rookie of the year in 2012.
Training camp begins Thursday and the Broncos open the season Sept. 5 against the Baltimore Ravens.