Here is a question with NBA training and coaches does Theis have an upside even at his age .
Sure. Players don't usually peak until 28 or 29, and big men often take longer.
Having said that, he'll be more productive as he gets acclimated to the NBA game, which he's in the process of figuring out. As the year goes on he'll do more of what helps the team and less of what hurts it.
He's been ridiculously turnover-prone and foul-prone and should up his production on the defensive board.
Love the feel for help and pressure defense, the deflections and blocks, and he gets more than his share of steals.