As I recall he got tossed by the Bills (much to my surprise), picked up by the Eagles, then suspended for the supplement. Seems like the Bills might have known something was up. Here is a link that more or less confirms this, its the nfl version of the Mitchell report. You'll find Matt's name under the Eagles, not the Bills. Mike Golic (Mike and Mike) is also on the list.
http://www.signonsandiego.com/uniontrib/20080921/news_1s21nfllist.html