Hollinger said that he might go to the D-League to get used to the NBA game, but I think its better for him to stay up and practice with good players and learn through that even though he will see less than a couple of minutes a game on avg this season. That league is better for wing players, not big centers.
I think he will slowly work up and become a good big off the bench in a couple of years, but this year, he should learn the language and the style of this game in order to set himself up for a promotion in the future.