Little (6-foot-6, 218) and Justice (5-foot-10, 165) both received training camp invites after being among the 63 players to participate in the open tryouts.
A forward from Kansas, Little was a part of three Big 12 regular-season championship teams, appearing in 55 games in his three seasons.
A guard from Martin Methodist College in Tennessee, Justice is the reigning NCAA Slam Dunk Champion.
Tulsa will add to its training camp roster during the 2012 NBA D-League Draft on Friday at 6 p.m. The 66ers will be granted the sixth pick of the draft and will have eight total selections.