NFL threatens to suspend 4 players, over PED probe spat
Clay Matthews, Julius Peppers not sure if they'll talk about PEDs with NFL
Green Bay Packers' Clay Matthews, Julius Peppers on PED case: 'weren't willing to fall on the knife for something we didn't do' - ESPN
Green Bay Packers' Matthews, Peppers must talk to NFL about PED's or face suspension
James Harrison, Clay Matthews among NFL players facing suspension if they stay mum on steroid allegations – New York Daily News
NFL to Packers' Matthews, Peppers: talk or be suspended
Clay Matthews, Julius Peppers face difficult decision in PED investigation - ESPN - Green Bay Packers Blog- ESPN
Clay Matthews, James Harrison and Julius Peppers agree to be interviewed by NFL for PED investigation
Steelers' LB James Harrison not interested in talking to NFL – Macomb Daily
NFL threatens to suspend Clay Matthews, Julius Peppers, James Harrison for non-cooperation - The Washington Post
Roger Goodell to Meet with Julius Peppers, Clay Matthews over PED Use
Steelers' Harrison Facing Possible Suspension Over PED Probe Spat - CBS Pittsburgh