Posted by Sabrina B. @gametimegirl

The Dallas Cowboys signed tight end Jason Witten to a five-year, $37 million extension that includes $19 million guaranteed, a source familiar with the deal told ESPN NFL Insider Adam Schefter.

Witten, 29, had two years left on his current deal and he’s now under contract with the Cowboys through the 2017 season.

Witten posted news that he had agreed to an extension on this Twitter page Sunday.

“I am blessed to say that I will retire a cowboy! Thx to the jones family, and all the cowboy staff! True honor to put on the star!! #gameday,” he wrote.

Witten, a seven-time Pro Bowler, caught a career-best nine touchdown passes last season and has three seasons of at least 1,000 yards receiving, including 2010.

Witten currently is on his second NFL contract. In 2006 he became the highest-paid tight end when he signed a seven-year $29.5 million deal with $12 million in guarantees.

WRITTEN BY: Information from ESPN NFL Insider Adam Schefter and ESPNDallas.com’s Calvin Watkins was used in this report & FULL STORY HERE