NFL Network Insider Ian Rapoport reports defensive lineman David Irving is facing a four-game suspension for violation of the league's performance-enhancing drug policy, according to a source. The issue stems from a supplement Irving had a marketing deal with, per Rapoport.
Irving is appealing the suspension, per Rapoport.
Irving came on strong down the stretch last season, morphing into the Cowboys' best pass rusher. The 23-year-old notched four sacks in 2016, including three in a two-game stretch in December.