Do your job

Peter King provides the source:

"Do your job'' is a statement Bill Belichick, via multiple NFL Films mikings, has made a part of the vernacular in New England.

"Do your job'' is something Bill Parcells used to say all the time coaching the Giants, with Belichick on the staff. (As in, "Just do your job and shut up,'' and variations of that theme that he'd say to his players.)

"Do your job'' is something Al Davis used to say when Parcells would call him and talk about what was going wrong with whatever team he was coaching at the time. It would be Davis' effort to get Parcells to get everyone on his team to take accountability, including players and coaches.

So the next time you hear Belichick say that statement, know that it had its birth with Al Davis.

Photo link here.