The Nittany Lions stay as No. 8 despite defeating John Hopkins last week.
Reidler's commitment comes minutes after Arsenii Sergeev's departure.
Sergeev impressed during his lone season with the Nittany Lions, helping lead them to the program's first Frozen Four.
This season is stacked with several "Bark in the Park" nights and Star Wars night, to name a few.
The Nittany Lions headed to St. Louis, Missouri, for the first Frozen Four in program history.
By reaching its first Frozen Four, Penn State is a realistic contender for even more success down the road.