"We've only agreed to visit Minnesota first", McCartney said.
A source said Philadelphia free-agent defensive tackle Beau Allen, a Minnetonka, Minn., native, has received interest from Detroit and Tampa Bay but the Vikings did not reach out early in free agency.
The 29-year-old veteran has thrown for at least 4,000 yards and 25 touchdowns in each of the past three seasons.
That leaves Kirk Cousins as the lone game-changing quarterback available with National Football League free agency officially set to begin Wednesday afternoon. This figure and the term of the contract - unlike with Cousins - should not preclude the Broncos from drafting a quarterback fifth overall if they choose to go in that direction. With an estimated $100 million in cap space this offseason, the Jets were willing to give Cousins a contract in which he would be given $60 million in his first year alone. Prior to last season, Keenum had spent two up-and-down years with the Rams, where he compiled a 7-7 record as a starter.
The deal can not become official until the new league year begins on Wednesday.
The Vikings are coming off an NFC Championship Game appearance with perennial backup Case Keenum as its starting quarterback after injuries sidelined Sam Bradford and Teddy Bridgewater. But, until he inks a deal with another team, he is still just a free agent who is a former Redskin.
It remains be seen how hard the Vikings will look to retain Johnson, who made $2.35 million last season. He was once a first-round pick for the Vikings and led Minnesota to the playoffs. He will have similar tools to work with in Denver, which should provide some optimism in his ability to reproduce last season's breakout campaign.