Walker faces two counts of second-degree criminal possession of a weapon and criminal possession of a firearm.
Glover is the No. 4 running back in Delaware.
Barry is the 40th transfer to commit to Penn State football.
The NIttany Lions will face the Black Bears for the first time ever on September 11, 2027.
O'Hara has four years of eligibility remaining.
Lukac is the son of former Penn State tight end Mike Lukac.