Hayes was rated as a four-star recruit out of high school.
White came to Happy Valley from Texas A&M this season.
Penn State earns its first series sweep over Minnesota since November 2019.
Dinkins has one year of eligibility remaining.
Askew is the 14th player to commit to the Nittany Lions this cycle.
Braeden Davis burned his redshirt after filling in for the injured 141-pound starter Aaron Nagao.