Cincinnati Bengals defensive tackle Antwan Odom admitted Thursday night via Twitter that he has tested positive for a banned substance and is appealing his four-game suspension. Odom said rumors, published on several Internet sites, that he had tested positive for Performance Enhancing Drugs or steroids were untrue. "Please don't believe the rumors," he tweeted. "Yes I tested positive for a banned substance but it wasn't steroids or PEDs. ... For now it's a league issue that's under appeal. Just know that I would never cheat to gain an edge in this game that I love."