In reading the article, I think what GT meant by the above is that the Zips now have 3 serviceable bigs (Riak, Sales, and E-man), so it will free up Utomi from having to play center. I don't think GT meant Groce might have all 3 on the court at the same time to "free up" Utomi & Ivey for shots.
I would have liked more information on our other newbies. Toles, Cheese, Roscoe, Jackson, and Banks. I've got so many questions about this team.