School officials say they won’t release any testing information regarding individual athletes due to privacy concerns.
Mertz set a school record for completion percentage on 20-of-21 passing, finishing with 248 yards and a record-matching five touchdowns.
Meanwhile, leading up to the game, Badgers players took to Twitter to urge fans to avoid watching this season's action in crowds.
Both the men's and women's teams reported a positive test result and will quarantine for 14 days.
Wisconsin will open the season without quite as much experience as it expected to have.
Wisconsin coach Paul Chryst said it is too early to tell how much time quarterback Jack Coan might miss after the senior injured his foot in practice.
Wisconsin quarterback Jack Coan is dealing with a foot injury as the Badgers prepare for the start of their coronavirus pandemic-delayed season.
The team will open the season at Camp Randall Stadium in Madison on Oct. 24 against Indiana and finish on the road Dec. 12 at Iowa.
The Big Ten reversed course and announced that beginning Oct. 23-24 all 14 teams will be scheduled to play eight regular-season games in eight weeks.
Twenty-nine of the positive tests were from Sept. 1 through Sept. 15, according to Public Health Madison & Dane County.
Barry Alvarez said the president drew attention to Big Ten Football, but: "how much that had to do with us being back on the field, I don't know that answer."
As the countdown to the college football season opener ticks forward, there is a sense of relief and normalcy for Badgers fans.
The Big Ten conference changed course and said it plans to begin its season the weekend of Oct. 24. Each team will have an eight-game schedule.
If things move quickly, the Big Ten could start a season in about a month, but for now there is no timetable for a vote to move forward.
The NCAA will furlough its entire Indianapolis-based staff of about 600 employees for three to eight weeks in a cost-saving move.
The Big Ten, in a statement, said a White House representative reached out to the conference commissioner to set up a phone call with President Trump.
Big Ten coaches, athletic directors and medical personnel are working through plans that could bring football back as soon as Thanksgiving weekend.
The Big East and its teams -- including Marquette -- have suspended all fall sports competitions due to the COVID-19 pandemic.
Five months almost to the day after the first spikes in coronavirus cases in the U.S. led to the cancellation of the NCAA basketball tournaments, the still raging pandemic is tearing down another American sports institution: fall Saturdays filled with college football.
ESPN reported, citing sources, that "a vast majority of Big 10 presidents" say they'd vote to postpone the season, hopefully to spring.