The Buffalo Bills announced the signings of C Marvin Philip and WR P.K. Sam on Tuesday. Philip enters his fourth year in the NFL after stints with the Steelers, Browns and Saints. A former California Golden Bear, Philip was the pivot predecessor to current top draft prospect Alex Mack. Sam spent 2008 with the Toronto Argonauts - not to be confused with the Bills. He spent the prior four years bouncing between four teams (NE, CIN, MIA, OAK).