Will Bynum, they guy who transferred from Arizona to Georgia Tech. I assume he's already been guarenteed a starters spot (why else would he transfer?). Does he bump out Elder, Lewis, Jack or take a seat on the bench?
In college it's much easier to go with a dual-PG lineup, and I suspect that GT will do that with Jack and Bynum. Jack is tall enough (6'4) to easily defend opposing team's PGs as well, so it should work out OK.