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 ...

"One of the first guys I watched really closely was Marshawn Lynch because I just liked how hard he ran and the physical style. I mean, those crazy runs, breaking all those tackles," Jeanty said ...