Matthew Stafford has agreed a new three-year contract extension with the Detroit Lions worth up to $53m, according to ESPN.

The Lions signal caller had two years remaining on his last deal, but his extension ties him to the team until 2017.

His old rookie deal was a six-year contract worth $78m - with $41.7m guaranteed - following his selection as the number one pick of the 2009 NFL draft.

His new deal includes $41.5m in guaranteed money. Four weeks ago Stafford revealed his agent was in talks regarding a new contract, but vowed to concentrate on his performance on the field.

"I don't play this game to get contracts," Stafford told ESPN last month. "I play this game to win games."

The quarterback led the Lions to the playoffs two years ago for the first time in ten years.

Following his number 1 draft selection, Stafford struggled with injury but his breakout 2011 season saw him throw for more than 5000 yards and 41 touchdowns.

He regressed slightly last term, throwing half the number of touchdowns and the second highest number of interceptions of his career.

The Lions dropped to a 4-12 record last season and missed the playoffs.

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