Dalvin Cook will stop participating in any team-related activities with the Minnesota Vikings until he receives a "reasonable" deal.

"He's out," a source told ESPN. "Without a reasonable extension, he will not be showing up for camp or beyond."

The Vikings signed Kirk Cousins to an extension that will pay him $150 million over five season. Cook has one season at $1.3 million remaining on his contract.

A running back's greatest leverage in negotiations is his service; Cook is now withholding his, as Ezekiel Elliott did last year. Minnesota needs Cook and his 1,135 rushing yards and 13 touchdowns from last season.