Potts spent five years as a backup in college.
Olu Fashanu to New Orleans is a popular pick in recent mock drafts.
Allar threw to eight different receivers on Saturday afternoon.
Freshman running back Quinton Martin Jr. had two touchdowns en route to a White 27-0 blowout win.
The annual scrimmage kicks off at 2 p.m. on the Big Ten Network.
Kirwan was among the team's most productive players last season.