It is hard to tell because every single protester exposed potentially will have infected other people when they went home to their families or homes. Then, the ones they infected can potentially spread out fast. At that point, they may be asymptomatic.
Let's hope that because of the warming weather and rising humidity that the pores of Covid-19 were/are less airborne.
If they decide to have the players/athletes return to campus, they better confine them somehow to shelter in place and limit contact. This is crazy horrible, a bad sci-fi movie coming to life. At least, there are probably no zombies.