The Nittany Lions will face Iowa, Michigan, Michigan State, and Maryland, Nebraska, Illinois, Ohio State, and Rutgers.
Retherford is one of six wrestlers to ever win the Hodge Trophy multiple times.
Nolf competed with the Nittany Lions from 2014-19.
American will travel to Penn State on Friday, February 21, just before Penn State heads to Big Ten Championships.
Retherford will compete in his first Olympics in the 65-kilogram freestyle category.
Barraclough held a 15-13 record as a Nittany Lion.