By Andrew McCarty Today is the birthday of New England Patriots head coach Bill Belichick. The legendary NFL head coach turns 70 years old today. Despite his increasingly advanced age – for an NFL coach at least – he’s still one of, if not the, best in the game right now. With Belichick’s birthday on hand, NBC Sports Pro Football Talk insider Mike Florio recalled something Kraft told him at NFL league meetings several years ago. Kraft wants Belichick to coach into his 80’s. “Several years ago at the league meetings, Robert Kraft told me that he wants to see Bill Belichick coach into his 80s. H…