With a UFC roster spot possibly at stake, Nickal will fight Zachary Borrego on August 9.
Mack will join high school teammate Conrad Hussey in Happy Valley, who committed to the Nittany Lions' Class of 2023 in April.
The Squirrel and Acorn Bookshop will replace The Animal Kingdom later this summer.
All full-time Penn State faculty members will be eligible for at least six weeks of paid parental leave beginning July 1.
Brockington signed an Exhibit 10 contract after going undrafted in the 2022 NBA Draft.
Nelson is the tenth recruit ranked as a four-star or higher in the Nittany Lions' Class of 2023.