Raiders Mt. Rushmore was easy for two, hard for two

Monday’s edition of Pro Football Talk on NBCSN included the Raiders’ Mt. Rushmore. It was easy to name two of them:  Al Davis and John Madden. For the other two, it got a little more difficult.  I picked Fred Biletnikoff and Gene Upshaw.  PFT Planet picked Marcus Allen and Howie Long. So who Erik Kuselias…