Pittsburgh Steelers linebacker James Harrison, Green Bay Packers linebackers Clay Matthews and Julius Peppers and free-agent linebacker Mike Neal have scheduled interviews to speak with NFL investigations in their probe of accusations of performance enhancing drugs.
Multiple media outlets report that Harrison will meet with the NFL on Aug. 30, Matthews and Peppers are scheduled to interview on Wednesday and Neal's meeting is set for Thursday.
All four players and retired quarterback Peyton Manning were named in an Al Jazeera America documentary accusing them of using performance-enhancing drugs.
The NFL cleared Manning of any wrongdoing, and last week the NFL issued a letter to the NFL Players Association threatening the players with a suspension if they did not agree to talk to the league by Aug.