Nelson was initially a safety and is still listed as such on Penn State Athletics' website.
This year's captains include three defensive players, two offensive players, and a punter.
Penn State and West Virginia will compete in a blood drive competition benefitting the American Red Cross on Thursday, August 29.
Drew Allar, Abdul Carter, Dvon J-Thomas, and Vega Ioane were all recognized.
The Commanders could give McSorley a chance to start against the Miami Dolphins on Saturday.
James Franklin did not describe the injury as "season-ending."