The Minnesota Vikings pounced early to land free agency's biggest prize.

Kirk Cousins plans to sign a three-year, fully guaranteed contract with the team Thursday, sources told ESPN's Adam Schefter.

The deal is worth $86 million "or so," according to NFL Network's Ian Rapoport.

Cousins is set to have dinner with Vikings coaches and personnel Wednesday night once the 2018 league year has officially begun, sources told Rapaport, and will make his first visit to the team's facility Thursday.

The move comes shortly after it was reported that Case Keenum intends to sign with the Denver Broncos at the official beginning of free agency.

Cousins was widely regarded as the top quarterback on the free-agent market, and the No. 1 target of the Vikings and several other QB-needy teams.