ANN ARBOR, Mich. – It’s unclear whether Wisconsin will be without star QB Graham Mertz -- and possibly its top three quarterbacks -- when it travels to Ann Arbor in three weeks to play Michigan. Over the weekend, reports emerged that Mertz had tested positive for COVID-19. That first positive test came from an antigen test, and on Tuesday, CBS Sports' Dennis Dodd reported that Mertz tested positive for a second time -- presumably through a polymerase chain reaction test. That would be exactly 21 days from Mertz’s positive test, and according to ESPN’s Adam Rittenberg, he would be allowed to return to action that day. Unfortunately, Wolf has also reportedly tested positive for COVID-19, though he hasn’t had a second positive test confirmed.