DeVante Parker Rips NFL Over Head Injury, 'Get On Y'alls F***in' Jobs!'

New England Patriots wide receiver DeVante Parker is going OFF on the NFL ... saying officials need to "get on y'alls f***in' jobs" and take care of players who may have suffered head injuries during games.

Parker appeared dazed after getting hit with four minutes left in the first quarter of the Pats' "Monday Night Football" game against the Arizona Cardinals ... and teammate Nelson Agholor had to beg the referees to pause the contest so the veteran wideout could get checked out.

The NFL Players' Association is currently investigating why the league's concussion spotter didn't immediately stop the game ... especially considering the new protocols put in place following the handling of Dolphins QB Tua Tagovailoa's head injuries earlier this season.

Parker was visibly wobbly after he made the 10-yard catch -- he actually bumped into teammate Cole Strange as he tried to walk.

Parker thanked Agholor for looking out for him ... and it was for good reason -- #1 didn't return to the game after being examined by the medical staff.

The Pats are now dealing with a short receiving core ... as Jakobi Meyers also missed Monday's game due to a concussion.