ALAMEDA -- Jarrod Cooper summed up his suspension as only he could.
On his first day back with the Raiders on Friday, Cooper said his four-game suspension for violating the NFL's policy against performance-enhancing drugs wasn't a result of an elaborate doping regime.
Turns out the suspension didn't cost Cooper his sense of humor.
"I'm not out there running with Marion Jones," Cooper said. "It was over-the-counter, just something you pick up at your local vitamin store. It wasn't FDA approved ... It was my fault, totally, because I went to the store, I bought it, and I didn't think about it. Just a recovery shake, and something was in it, and there you go."
Prior to that shake, Cooper hadn't been in any trouble since joining the Raiders during the 2004 following run-ins with law enforcement while playing for Carolina.
Cooper was a team comedian and special teams standout. The Raiders cut Cooper following the suspension.
Raiders coach Lane Kiffin told Cooper there would be a chance for him to return to the Raiders, which happened this week when Cooper worked out for the team.
Cooper won't be active Sunday in San Diego, but will have a chance to play when the Raiders host Kansas City on Oct. 21.
QUICK HITTERS -- A House committee that criticized the NFL's retiree benefit system asked the league and the players' union to turn over information on football injuries, the disability and retirement system and what's being done to help battered and broken retirees. The House Judiciary Committee has arranged for the Congressional Research Service, an investigative and research unit, to conduct an independent study of those questions as well, committee leaders said in letters to the National Football League and the National Football League Players Association (NFLPA). ... Dallas Cowboys safety Roy Williams has been fined for the second time this season for a "horse-collar" tackle. The NFL fined Williams $15,000 for a tackle against running back Marshawn Lynch in Monday night's game at Buffalo.