The man played nothing but garbage minutes and you are quoting advanced stats?Good energy doesn't make you a good defender.
He has a negative career DBPM and averages 4 fouls and 5 fouls per 36min in the two seasons he's played. Rudy by comparison, averages around 3 fouls per 36 during his time in a jazz uniform and he plays center.
Last year in Minny where he actually got some non-garbage minutes his DBPM was a -0.7 which is really good for a rookie. He had defensive upside.