Dallas Cowboys linebacker Randy Gregory and Green Bay Packers defensive tackle Mike Pennel were each suspended for the first four games of the 2016 season for violating NFL's substance abuse policy, it was announced Friday.
The league's substance abuse policy states that a four-game suspension is the result of a fourth failed test.
Gregory, a second-round pick, failed drug test at the 2015 NFL scouting combine and now he will miss games because of a subsequent failed test.
Gregory had three sacks in preseason games in 2015, but missed four regular-season games in his rookie season because of an ankle injury.
He was a part-time player for the Cowboys, recording 11 tackles and no sacks. He also had 16 quarterback pressures.
Pennel played in 16 regular-season games in 2015, including five starts, and played in both of Green Bay's postseason games. He had 25 tackles, including a sack and a forced fumble.
In 2014, as a rookie, Pennel played in 13 games, with no starts, and made nine tackles.
Gregory and Pennel are eligible to participate in all offseason and preseason practices and games.