The decision comes shortly after Wiebusch's linemates, Charlie Cerrato and Matt DiMarsico, announced they would be turning pro.
Penn State won its first game in three weeks, but dropped in the rankings.
Penn State drops outside the top 10 following its loss to Johns Hopkins.
Blackwood appeared in 26 games for Penn State in 2025-26.
Both players that Penn State added played in international leagues.
Penn State secured its third ranked win this season.