It’s been a weird couple days in the NFL.  Here are a few stories that are making the rounds, each of them a head-scratcher: Rookie WR Michael Crabtree, after spending significant time away from San Francisco, finally signed a six-year contract with the 49ers.  If he has two outstanding years in his first four, the contract evolves into a five-year deal.  The weird part of all this?  M.C. Hammer was apparently present during negotiations.  Yes, really, that M.C. Hammer.