Woods is the 19th commit in the Nittany Lions' 2025 recruiting class.
McClary's flip comes two days after former four-star running back commit Alvin Henderson flipped to Auburn.
Branch was the Nittany Lions second commit from the class of 2025.
Matthews was Penn State football's first commit for the class of 2025 before reopening his recruitment in September.
The renovations are expected to be completed before the 2027 college football season.
After 26 years of service with the Marines, Graham works as a professor, lab director, and coach at Penn State.