Adam Gress was nursing an injury last week, and he was not listed as the definite starter at right tackle. He's still battling with TE-turned-OT Garry Gilliam. Bill O'Brien will likely update Gress' progress on Tuesday.
Von Walker, a run-on whom O'Brien complimented last week, is listed as competing for the No. 2 kickoff return spot with Akeel Lynch. Walker is an athlete whom PSU hopes to utilize as a slotback. This might be the biggest surprise on the depth chart. You can read more about Walker here.
D.J. Crook is listed as the third-string quarterback. He was competing with Austin Whipple and Jack Seymour for the No. 3 spot. He was listed as the third-stringer on the post-spring depth chart as well.
Bill Belton is still listed as the No. 2 tailback, ahead of Lynch ... but that likely doesn't mean much. Both will see carries.
There's an "OR" listed next to Malcolm Willis' name, signifying he's still competing with Ryan Keiser at safety. Willis is obviously expected to be the starter -- barring injury. O'Brien will undoubtedly be asked about that on Tuesday.
Middle linebacker Glenn Carson is still listed as the snapper at punter, despite picking up a run-on whose specialty is snapping and having Howle snapping on field goals.