Three-time Pro Bowl selection Prescott is coming off a well-timed career year, as he led the league with 36 touchdown passes and 410 completions and finished second in the league’s Most Valuable Player voting.
Dallas owner Jerry Jones had faced questions all summer over why both Prescott and star wide receiver CeeDee Lamb had not been given new contracts.
Lamb has agreed a four-year, $136m(£104m) contract after a protracted stand-off with the Cowboys, and now his quarterback’s future in Dallas has also been secured.
Prescott has been a prolific passer during his time with the Cowboys, and has led them to the play-offs in three successive years – with three consecutive 12-win regular seasons.
Winning in the play-offs has been the problem though, with Prescott successful in just two of his seven post-season games and having failed to progress beyond the divisional round.
With a Super Bowl drought closing in on 30 years, ‘America’s Team’ badly need to taste some success again, and now they are banking on Prescott being the man to lead them to glory.