Off the top of my head, I'll be honest and say I don't know. But I'll counter you by asking if he is the second best center in the league, a position that is very weak (looking at names, stats, and using common sense), then why does he not have better stats? I'm not saying stats tell the whole story but Jesus the position is so weak across the board in the league and yet he averaged just 12.8 ppg last season (on under 50% from the floor), 2.0 assists, and 44.2% from the line. Sorry but he's nothing special.
And yes I know the Bucks play a slower tempo.