Adams spent seven seasons at Villanova before joining the Denver Broncos in 2022.
Michigan State confirmed the alteration after ESPN first reported the date change.
Grunkemeyer is the first quarterback to join Penn State's recruiting Class of 2024.
Lee joins the Bulldogs with two years of eligibility remaining.
Collins spent just one year with Mississippi State before transferring and didn't register an appearance during that time.
With only 110 days left before the Nittany Lions' season opener against West Virginia, Penn State announced themes for all seven of its home games on Monday.