Washington Redskins defensive end Jarvis Jenkins was suspended without pay for the first four games of the 2013 regular season for violating the NFL policy on performance enhancing substances, the team announced Friday.
Jenkins is eligible to participate in preseason practices and games but will not be on the team's active roster until after the Sept. 29 game against the Oakland Raiders. The substance in question was not identified.
"When I learned that I tested positive for a substance that is banned under the NFL policy, I was shocked and confused," Jenkins said. "It's an obscure substance that I've never even heard of, and I still don't know how it got into my body. My only guess is that it came from one of the supplements I was taking around the time of the test, even though none of them listed anything banned.
"I'm very sorry for the effect of this situation on my teammates and coaches, and I also apologize to my family and all Redskins fans. I will be very, very ready to contribute as soon as I get back for Game 5."
Jenkins played in all 16 regular-season games last season and finished with 24 tackles.