Minnesota Vikings quarterback Matt Cassel has exercised his right to opt out of the final year of his two-year deal he signed with the Vikings last year, ProFootballTalk.com reported Friday.

With his decision to void the final year of his contract, Cassel will become a free agent on March 11.

Cassel had until Friday to opt out. If he had decided not to opt out, the Vikings would have had until March to either pay Cassel a $500,000 roster bonus or release him, according to an ESPN.com report.

Cassel was due to earn $3.7 million with the Vikings next year. Now he will take his chances in the free-agent market.

Cassel played in nine games for the Vikings last year, including six starts. The Vikings were 3-3 in games he started, but Cassel came off the bench to help Minnesota win two other games.

Cassel completed 60.2 percent of his pass attempts in 2013 with 11 touchdown passes and nine interceptions.

The move leaves the Vikings with only one quarterback under contract for 2014 -- Christian Ponder.