Campbell was a key player the Nittany Lions would have loved to have back in 2026.
Nwosu averaged 46 yards per punt in 2025.
The former Iowa State player has four years of eligibility remaining.
Jackson was released from his signing with Iowa State on December 10.
RIT goalie Jakub Krbecek blanked the Nittany Lions in his 44-save shutout performance.
Penn State has now lost at The Palestra two years in a row.