Per Mike Fisher of 247 sports, Dallas Cowboys defensive tackle David Irving has missed multiple mandatory drugs tests over the past eight weeks. This has hampered his opportunity to potentially playing with the Cowboys in the playoffs as well as being able to play football in the league.

Irving is a fourth-year defensive end out of Iowa State for the Cowboys. He had only played in two games for the team this year, recording four tackles and one sack.

His best season came into 2016, where he led the team in forced fumbles with four. He also had 17 tackles and four sacks as well. Since then, he's been on off-injured and suspended, very inconsistent as a player.

His off-field life has been very dramatic, including a legal dispute with his ex-girlfriend who is the mother of his child. He was also hurt with an ankle injury that left him out almost the entire year.

And even when he was active, Irving has failed to attend practices as a player, observer, in the film rooms or meetings. He's refused the team's help to rehab the ankle with the team. Irving seems to be distancing himself from the team, his failed drug test just the cherry on top of his poor conduct.

A source close with the situation told Fisher quite simply:

“He's just sort of checked out.”

Fisher earlier this year was optimistic about the rest of his career:

“I’ve been through a lot, (but) I’ve seen the light at the end of the tunnel.”

This will be the second season in a row where Fisher will start the season suspended.