Early Sunday morning as tailgates began firing up at Gillette Stadium ahead of the Bills game, a bit of a bombshell broke. NFL Network’s Ian Rapoport reported that Bill Belichick – who’s job security has been in question the last few weeks – actually signed a ‘lucrative, multi-year’ contract in the offseason. “Sources say Bill Belichick during the offseason quietly agreed to. lucrative, multi-year new contract,” he said during NFL…