Penn State's first graduate transfer and Swedish player is poised for a big 2018-19 season after spending three years with Merrimack.
The Nittany Lions check in at No. 8 following their bye week.
"Trevor and Erik were obviously huge parts of our defensive core, but I think we have a great group of guys here on the back end."
Millen is battling a rare heart condition and will step away from his role as an analyst for BTN as he continues to focus on his health.
The Nittany Lions' 16-game home winning streak is over, but it was the third longest in the NCAA behind USC (18 games) and Alabama (22).
Getting back to the level reached in 2016-17 may be the best-case scenario for Guy Gadowsky's program this season.