ORCHARD PARK, N.Y. -- With the Buffalo Bills season' over, coach Doug Marrone has a three-day window to terminate his contract as a result of the team's ownership change, sources told ESPN senior NFL analyst Chris Mortensen.

With a multitude of openings around the NFL, will coach Doug Marrone return to Buffalo? AP Images/Paul Sancya

Whether Marrone has any intention of using the clause, which runs through Wednesday, remains unclear.

At the Bills' season-ending news conference Monday, a question about Marrone's contract was initially blocked by a team spokesperson before Marrone decided to answer the question anyway.

"I can't answer that question," Marrone said. "I will tell you this and my background has been the same and you guys can look into. I do not discuss my contract and that's my rule. I never have and never will."

With five head-coaching vacancies around the NFL as of Monday evening, Marrone would be expected to generate interest should he decide to leave the Bills.

Here is how ESPN NFL Insider Adam Schefter views the situation, from his appearance Monday on Sirius XM NFL Radio with Vic Carucci and Pat Kirwan: