Lincoln Riley is hopeful the 2020 college football season will begin on time and is confident Baker Mayfield will bounce back this year. (1:56)

Big 12 commissioner Bob Bowlsby has been speaking with the other Power 5 conference commissioners daily and said Thursday that he remains concerned about "whether or not we can have a full and robust football season," as the future of the sport remains uncertain because of the coronavirus pandemic.

"Virtually every program is highly reliant on football revenue," Bowlsby told ESPN. "We're making lots of contingency plans, but if you don't get the anticipated number of games in, you lose the donations, you lose the sponsorships, you lose the gate receipts and you lose the TV. It's potentially very impactful."

Bowlsby declined to say which specific models the league is considering if the season has to be altered or pushed back. The Big 12 implemented a 10% salary cut across the board in the conference office, including for Bowlsby, he said.

"We've eliminated all year-end bonuses and are formulating a reduced scope of operation plan that saves quite a bit of money, but we're a relatively small operation," he said. "Most of our resources are passed through to our members."

The salary cut involved the league office and not coaches, Bowlsby said, adding that those would be "institutional decisions."

Bowlsby said the conference isn't ready to put a deadline on any decisions.

Asked if the Power 5 commissioners have talked about shortening the season, Bowlsby said, "We've talked about every permutation you could name," but he declined to elaborate.

"We don't know when somebody is going to tell us it's going to be OK to go back to close contact," he said. "I suspect that medical experts and scientists are going to be slow to give the green light on that. The magic start date is probably a mirage.

"It may be different in some high-density populations and areas than it is in more remote areas," he added. "It could be certain parts of the country and not other parts of the country. I don't think there's just going to be a day when we turn it all on again. There has to be a reacclimation period, because athletes aren't training at the same level they had been accustomed to."

Oklahoma athletic director Joe Castiglione said he and his fellow ADs have been considering a number of options as they discuss what college football could look like in 2020.

"We're looking at all kinds of models, between a full season starting on time, to slightly altering the start of the season, whether that means moving it up a couple of weeks, back a couple of weeks, whether that means a shortened season, whether that means moving the entire season or a portion of the season to the spring," Castiglione told reporters via teleconference Wednesday. "We're looking at any and all kinds of models and be able to adapt to one of them depending upon what the medical experts tell us."

Castiglione said there may not be a "perfect solution" but that any decision would prioritize health and make sure the players are properly prepared to compete.

"There are a lot of ideas that may or may not come to fruition, but we're throwing them all out there so we can tap into the best practices when necessary," he said. "Hopefully we're not having to do something too drastic, but we'll adjust as the medical experts say we can."

The conference is continuing to adapt to the current financial situation. Last month, Bowlsby said he expected the league to receive about $10 million from the NCAA instead of the anticipated $24 million.

Bowlsby said the cancellation of the Big 12 basketball tournaments would result in about $6.6 million in losses. With the league eliminating some costs related to travel, staffing and other expenses, he estimated the overall losses at between $15 million and $18 million.

The commissioner said he anticipated that the Big 12 would still be able to "make members whole" in financial distributions this year by using its reserves.

The Big 12 distributed $373.9 million for the fiscal year ending in June 2018, with distributions ranging from $36.6 million to Oklahoma to $33.6 million to Kansas.

"With the uncertainty of competition next year, those revenue streams become potentially less stable," Bowlsby said.

Bowlsby said that universities are under "tremendous financial stress" and aren't in a position to help their athletic departments, but that most in the Big 12 are self-sustained.

"If it was just something that was unique to athletics, it would be different, but universities are giving back board and room charges and they're refunding tuition and they're doing things, canceling summer school and doing things that have previously generated cash flow," he said. "They're not able to do anything really to help the athletics programs very much.

"Especially at our level, they tend to be self-funded, for the most part. The institution isn't capable of making up lost revenue. What do you do? You have to reduce operations. To reduce at levels that could be imagined is enormously difficult."