The Vikings offered Cousins a three-year deal that pays $28 million annually, according to NFL Network's Ian Rapoport, who added the team believes it will have a commitment from the quarterback by the end of his visit Thursday.
Those are the kind of numbers the Broncos will want for $18 million a year, not the 62 completion percentage and 1.7 TD-to-INT ratio that Keenum has averaged per season since entering the league. Free agency starts Wednesday - so nothing can be official until then.
While he makes his decision, ESPN reports a camera crew will follow Cousins.
This spring, the Redskins had finally had enough, and, instead of negotiating with Cousins once again, they traded for Kansas City Chiefs quarterback Alex Smith, opening the door for Cousin's departure.
Cousins joins a talented Vikings team that went into the offseason with a glut of talented quarterbacks.
"Will only confirm they'll get the first visit", McCartney told the the St. Paul Pioneer Press.
Keenum resurrected his career in Minnesota this past season, throwing for 3,547 yards and 22 touchdowns to just 7 interceptions en route to leading the Vikings to the NFC Championship Game.
Cleveland had been considered the frontrunner to sign McCarron because the Browns tried to trade for him last season, when they missed getting the deal before the National Football League trade deadline.
Cousins had three 4,000-yard seasons with the Redskins. 2016 was arguably his best season, with him throwing for nearly 5,000 yards and getting named to the Pro Bowl. When injuries and other factors led to Griffin leaving Washington, Cousins became the full-time starter.