Rolando McClain will be suspended for the season's first 10 games for violating the NFL's substance abuse policy, according to multiple sources.

The Dallas Cowboys linebacker was suspended the first four games of last season for violating the policy.

Dallas re-signed McClain to a one-year deal worth up to $5 million in March.

He is set to receive a $1.25 million base salary and could earn $125,000 for each game he is on the 46-man roster, maxing out at $42 million. He also has $1 million in play-time incentives.

Sheldon Richardson has been suspended for Week 1 of the 2016 season for violating the NFL Personal Conduct Policy.

Richardson will be eligible to participate in all preseason practices and games.

Johnny Manziel has been suspended by the NFL for four games for violating their substance abuse policy.

Manziel is currently a free agent and has said he'll go sober beginning July 1st.

Julius Peppers, Clay Matthews and James Harrison will be interviewed by the NFL after they were named in an Al-Jazeera America report linking them to performance-enhancing drugs, according to a letter obtained by ESPN.

Adolpho Birch, NFL senior vice president of labor policy and league affairs, wrote that the league will meet with the three players at the start of training camp. The Packers open camp July 26, and the Steelers begin training camp July 29.

The NFL wrote that it has attempted since early April to schedule interviews with the players, saying delays by the NFL Players Association have "obstructed our ability to conduct and conclude the investigation." The league said it first notified the players about the investigation in January.