I thought the stare down at the end was dumb and could see that getting a T. But 90% of what happened there was Olynyk running into a brick wall - then Kaufusi hacked his arm to make sure he didn't get the "and 1" on the play.

Just out of curiosity - what do you think made it "dirty"? That exact same foul happens nearly every single game - except for the fact that the defensive player that the offensive player is running into typically isn't a defensive lineman too.