Kevin Peterson, sophomore, cornerback
Peterson was a bit of a surprise contributor as a true freshman, but after season-ending injuries to Devin Hedgepeth and Jonovan Griffin, he was needed. He'll go through his first spring workouts as the projected starter, replacing Brodrick Brown.
Sam Wren, junior, defensive end
A junior college transfer and early enrollee, Wren could be the newcomer with the best chance to see immediate playing time. He'll compete with youngsters such as sophomore Trace Clark, redshirt freshmen Emmanuel Ogbah, Victor Irokansi and Eric Davis and fellow early enrollee Naim Mustafaa for a starting defensive end spot.
Tracy Moore, senior, wide receiver
Moore was granted a medical redshirt after a severe ankle injury ended his 2012 season prematurely. It will be most interesting to see how his chemistry develops with each of the quarterback contenders. He clearly had it with Lunt, as the pair connected for four touchdowns against Arizona. But Moore was almost invisible when Walsh was starting, and never played with Chelf. Will he or Josh Stewart eventually emerge as OSU's go-to receiver in 2013?