A couple those fouls came when Trae got past Thompson, and Ausar then ran over him on the trail because he didn't anticipate Trae's little stutter step. Definitely something he needs to learn. And in general, he needs to accept that once his man is past him there is a limit to what he can do. He gets caught overplaying trying to make it up when he's been passed, and you just have to learn to accept that you can't do that.
His agility is something else to watch though - he's like a big cat out there.