[Ingtar]

So you can no longer tackle a receiver who gets behind you?

[circlecity]

"So you can no longer tackle a receiver who gets behind you?"

If the ball wasn't thrown to him, the play is on the other side of the field and he's not blocking - then yes, that's correct.

[sargon]

So you can no longer tackle a receiver who gets behind you?

No, it was the hit up near the line of scrimmage, against the receiver who wasn't involved in the play (since the QB had already released the ball downfield)...

[Codeflier]

You have to look at the fullback crossing short over the middle. The ball is already on its way deep and Burfict clocks him about 35 yards away from where the ball is thrown. In other words, don’t look at where the ball is thrown, look closer to the line.