An early header from Ally Schlegel and incredible offensive play from the Nittany Lions propelled them to the 3-0 win over the Wolverines.
Penn State has recorded back-to-back shutout wins for the second time this season.
The Nittany Lions dropped six spots from No. 10 last week.
The Nittany Lions bested the Eagles for the first time in program history to give Jeff Kampersal his 400th win.
The Nittany Lions escaped Iowa City with a five-set win Saturday night.
Clifford's premature exit left him with a 37% completion percentage, but Drew Allar did not fare much better.