Washington II has one year of eligibility remaining.
Grunkemeyer impressed in seven starts after taking over for an injured Drew Allar.
Ebel becomes the third Iowa State linebacker to transfer to Penn State.
Jarod Crespo's hat trick earned a split for the Nittany Lions to start the second half of their season.
After redshirting in 2025, Henderson has four years of eligibility remaining.
Jennings follows James Franklin and several others to Blacksburg.