Marshawn Lynch flunked an NFL drug test in 2009 ... and now the actual letter the league sent to the star running back is on the auction block!!
The auction, held by Lelands, also features a Babe Ruth signed baseball and a super valuable Michael Jordan card ... and while those may ultimately sell for more cash, the Beast Mode letter is by far the most unique item.
The correspondence, dated April 13, 2009 and written on an NFL letterhead, came from Dr.