Nick Young Says NFL 'Always Cheat for the Patriots'

Nick Young says it's painfully obvious why the Patriots are so damn successful -- the NFL's CHEATING FOR THEM.

On the same night as his accidental Iggy Azalea reunion, we also got Swaggy P to weigh in on the controversial Pats-Steelers ending from last Sunday.

Young told us Pittsburgh got screwed on the overturned TD call ... not like it surprised him.

"Yeah man, they got cheated," Young told TMZ Sports. "They always cheat for the Patriots ... they can't do no wrong."

Swaggy even speculated the NFL might have its own Tim Donaghy problem ... saying gambling probably played a role in the Pats getting the W.