Bradford, 30, began the 2017 season as the Vikings quarterback, but a knee injury felled him after Week 1, and he didn't start another game until Week 5.
The Vikings plan to sign former Washington quarterback Kirk Cousins to a three-year fully guaranteed contract, according to a Tuesday morning report from Schefter. McCown completed 67.3 percent of his passes for 2,926 yards, 18 touchdowns and nine interceptions.
Bradford, the first overall pick in the 2010 draft and one of the highest compensated players in National Football League history, likely is signing a short-term, incentive-laden deal after another knee injury limited him to two games with the Minnesota Vikings last season. He was 27 of 32 passes for 346 yards, three touchdowns, and no picks against the Saints in Week 1 of last season before a knee injury sidelined him for almost the entire season, giving way to the rise of Case Keenum.
The Cardinals are in need of a quarterback after Carson Palmer - who had been the team's quarterback for five years - retired at the end of the 2017 season. That history suggests the Cardinals will be adding other options at quarterback in free agency and/or the draft to go with Bradford.
Case Keenum, Minnesota's starter last season, agreed earlier in the day to a deal with the Denver Broncos. NFL Network's Ian Rapoport tweeted that Cousins and his agent will meet with the Vikings for dinner Wednesday night, and then visit the team's new Eagan facility Thursday.
The deal will reportedly be for two years.