Wisconsin may be facing the type of nightmare scenario that coaches feared as soon as the coronavirus pandemic arrived.

What happens if an outbreak hits a team’s quarterback room?

Wisconsin isn’t commenting on the COVID-19 testing results of individual players, but CBS Sports first reported that quarterback Graham Mertz has tested positive a second time. Under Big Ten protocols, that means Mertz can’t play for at least 21 days.

If that weren’t enough, the Milwaukee Journal-Sentinel reported that quarterback Chase Wolf has tested positive at least once. Returning starter Jack Coan is out indefinitely after undergoing foot surgery. Junior Danny Vanden Boom is Wisconsin’s only other scholarship quarterback.

“Obviously this year there’s some things that will be unique,” Wisconsin coach Paul Chryst said Monday without specifically discussing his players’ test results. “I’ve appreciated what that whole room of quarterbacks has done, kind of how they’ve approached everything.”

The situation could leave the ninth-ranked Badgers incredibly shorthanded at the game’s most important position as they prepare to visit Nebraska, host Purdue and travel to No. 13 Michigan over the next three weeks.

It’s the type of dilemma schools were hoping to avoid when college football decided to play amid the pandemic.

Ohio State coach Ryan Day this week detailed how the third-ranked Buckeyes try to ensure the virus doesn’t spread among Justin Fields and the other quarterbacks.

“When they’re in the quarterback meeting room with (quarterbacks coach) Corey (Dennis), they obviously are all masked up and distanced, and they do a great job of that,” Day said. “I’ll grab Justin and take him on my own sometimes for a lot of reasons, but that’s one of the, to kind of keep him away from some of the other guys. What a tricky situation.”

Back in the spring, Penn State coach James Franklin noted the difficulties in holding team meetings while also keeping players away from one another as much as possible out of fear an entire position group could be infected.

“But the other challenge is, are you going to meet with all your quarterbacks at the same time and they all get sick, you don’t have a healthy quarterback,” Franklin said then.

Minnesota’s Tanner Morgan said Tuesday that coaches have often reminded him and the other quarterbacks that “it’s a crazy year, and crazy things could happen.”

“So when we’re meeting as quarterbacks, we’re all spread out, 6 feet apart,” Morgan said. “We all have our masks on. Coach has his mask on. Unless you take a drink of water and put it right back up. We’re taking it seriously, because 21 days is a long time, and that’s something that we really can’t afford.”

After announcing Aug. 11 that it would postpone all fall sports until the spring due to the pandemic, the Big Ten reversed itself and opened the season in mid-October. Because it started later than most other Power Five leagues, the Big Ten put together a nine-game, conference-only schedule without any off weeks.

So while Notre Dame could postpone a scheduled game with Wake Forest after experiencing a COVID-19 outbreak last month, Big Ten programs don’t have that luxury. The Big Ten's 21-day delay for players to return is also more stringent than other conferences — a decision the league knew could put its teams at a competitive disadvantage.

“I think there certainly were those questions after the decision was made,” Ohio State team physician Jim Borchers said last week. “And the answer is because that’s what it took to get us to a point where our presidents and chancellors felt comfortable in minimizing risk to allow a return to competition. And that’s all we really paid attention to.”

Big Ten protocols say that athletes who test positive through point-of-contact daily testing must take a polymerase chain reaction test to confirm the first result. All COVID-19 positive athletes must self-isolate for 10 days and undergo cardiac testing.

Doug Aukerman, the team physician for Pac-12 school Oregon State, said he considers the Big Ten policy reasonable.

“But at the same time, I prefer an approach where everybody isolates for 10 days and you do your cardiac testing and you return back based on their individual situation,” Aukerman said. “And pay attention to their individual symptoms as you progress them through those stages.”

The Big Ten and other conferences have set roster thresholds that teams must hit to play a game this season. Most include a 53-player minimum. There also are minimums at certain positions like quarterback (one) and offensive line (seven).

Several teams, including Florida and Vanderbilt, have postponed games because they haven't had enough players overall. Baylor last month postponed a game against Houston because it was short on offensive linemen.

No team has publicly acknowledged it had to postpone a game specifically because it lacked enough quarterbacks.

Mertz’s first positive test reportedly came one day after he went 20 of 21 and tied a school single-game record by throwing five touchdown passes Friday in a season-opening 45-7 victory over Illinois. Now the Badgers may have to turn to Vanden Boom, whose lone career pass at Wisconsin was for a 3-yard touchdown against New Mexico in September 2018.

While Wisconsin awaits answers, Big Ten teams continue reminding quarterbacks about the potential risks inherent in this unusual season.

“That’s another thing with this year, respect the virus,” Iowa quarterback Spencer Petras said. “I know all of us quarterbacks realize we have such a small room and it’s important we do what we can off the field to make sure we keep our circles extremely small and continue to do our best to avoid getting it.”

___

AP Sports Writer Dave Campbell and AP College Football Writers Ralph Russo and Eric Olson contributed to this report.

___

For more AP college football coverage: https://apnews.com/tag/Collegefootball and https://twitter.com/AP_Top25