Updated

Middle linebacker Sean Lee and the Dallas Cowboys have agreed on a six-year contract extension through the 2019 season.

A story on the team's website Wednesday night said Lee's deal is worth about $42 million but could escalate as high as $51 million depending on different incentives.

Lee's agent, Mike McCartney, posted a message on his Twitter account Wednesday congratulating Lee for "agreeing to a 6 year extension with the @dallascowboys"

Lee is going into his fourth NFL season since being a second-round pick from Penn State in 2010.

During his rookie season, Lee played 14 games behind Bradie James and Keith Brooking. He became a full-time starter in 2011, but missed 10 games last season after ligament damage in his right big toe.

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AP NFL website: www.pro32.ap.org