Acker fits the mold of the "new school" cornerback with good size (6-0, 195) and great length. His long frame and great speed help him consistently cover the best receiver on the opposing team. He has great ball skills which allow him to break up a lot of passes, including six through the first four games this season. He was also one of the lone bright spots for SMU in a recent defeat at TCU, registering three passes defended and essentially locking down whichever side of the field he was on for the entire game.
Acker is also a good piece in the running game, giving up his body on many occasions to take out lead blockers and allow his teammates to make the tackle, something that few cornerbacks do. He does, however struggle to get off wide receiver blocks in the run game when engaged one-on-one, which is something that players with his frame usually excel at.