Kessler was a depth chart quarterback at Penn State from 2014 to 2017.
Gattuso spent 11 years as the head coach of the University of Albany.
Bowen was a member of the Penn State coaching staff for three years, serving as co-offensive coordinator in the 2020 season.
Penn State brought on Shane Eachus and Brent Zdebski just over a week after Knowles' hiring as defensive coordinator.
Knowles touched on his defensive system, reasons for coming to Penn State, and drive to win a national championship.
Tinsley spent 2024 on the Washington Commanders' practice squad.