Carr is not a great on ball defender, most of his blocks comes as a help defender. Garrison will get the 5 back up minutes and MAYBE even some back up 4 minutes when the team needs to go big based on matchups. He is really good at the free throw line in the pick and roll / pick and pop. Also, Garrison will be much improved this year, he was only a freshman and held his own in the Big 12 last year, don't underestimate him, he will get plenty of minutes. It wouldn't surprise me if later in the year, he takes some of Williams minutes, not just as a back up. there is a reason Williams got a little upset when Pope signed garrison, he knows it is a possibility..