When he faces the real centers, the 7' 275 lb. types he will have problems keeping them at bay.
Don't forget he's not a stretch 4 or 5. He works mostly mid range and in close.
He's an aggressive, hard working big, that can defend, and we really needed that. Just to balance the aggressive defenders we have at PG, SG, and SF.
The C's are building a team of very strong, tough defenders, it's not all they need however, but you can win games with OK scoring and an excellent defensive team.