Vikings' Cassel to void option, test market

[ESPN]

Minnesota Vikings quarterback Matt Cassel, who emerged from a three-way QB derby to become the Vikings' starter for the last month of the season, might now be looking to see if his play in 2013 will earn him a bigger contract on the open market.

http://espn.go.com/nfl/story/_/id/10407092/matt-cassel-minnesota-vikings-void-option-test-market