Report: Wilson wants 1st-ever NFL contract linked to salary cap increases

Seattle Seahawks quarterback Russell Wilson is looking to set a new precedent by signing a contract that can rise in future years based on increases in the NFL's salary cap or new revenue streams the league may acquire, sources told NBC Sports' Peter King.

New revenue streams for the NFL could include gambling or future TV contracts.

Such a deal would be the first in history to fluctuate based on the league's unknown bottom line in future years, according to King.

Wilson, who's entering the final year of his current deal, has set an April 15 deadline for getting a new long-term contract done with the Seahawks.

King also reported that Wilson likely won't sign a long-term deal with Seattle if it isn't agreed upon by Monday, and will instead opt to play under the franchise tag in 2020 ($30.3 million) and in 2021 ($36.4 million).

Franchise tagging Wilson for a third year would cost $52.4 million in 2022.

Wilson's hard stance in negotiations has led to reports that he's interested in playing for a different team.

However, even without a deal in place, the quarterback will reportedly attend the first day of Seattle's offseason program.

Wilson has spent his entire career in Seattle and has never missed a start since entering the league in 2012. He's earned six Pro Bowl selections and led the club to a championship in Super Bowl XLVIII.