Detroit Lions receiver Charles Rogers has been notified that he is being suspended for four games because he is in violation of the NFL's substance abuse policy, sources have told ESPN's Chris Mortensen. The suspension could be announced this week unless Rogers appeals, the sources said. Under the policy, Rogers' suspension means he has had at least three positive tests of an illegal street drug. A fourth positive test will result in a minimum one-year suspension. Rogers was unavailable for comment, as was his agent. Rogers was the Lions' first-round choice in 2003, the No. 2 overall player chosen in the NFL draft. That year, ESPN reported that Rogers was flagged by the NFL's medical advisor when he provided a diluted urine sample at the NFL Scouting Combine before the draft. The result placed Rogers in the substance abuse program, which made him subject to random testing.