Tony Romo appears to be a lifelong Cowboy.
The 32-year-old quarterback has agreed to a six-year extension with the Dallas Cowboys worth $108 million, $55 million of which is guaranteed, a source inside the team said Friday.
"I want to thank the entire Jones family for believing and trusting in me to finish my career as a Dallas Cowboy. There will be no greater reward, besides winning a Super Bowl, than playing my entire career as a Dallas Cowboy," Romo said in a statement. "[...] Our goal is the Super Bowl and I am determined and honored to be the guy in this position to help our team do that."
That makes Romo the highest paid player in team history and, leaguewide, he trails only Tom Brady's $57 million in guaranteed money.
"This is a significant day in terms of securing stability for our team for the future," said Cowboys owner Jerry Jones in a news release. "Tony is uniquely qualified to lead this team at the quarterback position for the next several years. He has an abundance of experience and familiarity with our offensive philosophy, our head coach and the personnel around him."
The contract extension will give the Cowboys more room to maneuver this coming off season. While team officials have not detailed specifics in how the extension will affect the salary cap, the Cowboys were going to have to take a $16 million cap hit under Romo's previous deal.
The agreement, reported on the team's website, will lower the quarterback's salary cap number for 2013 by about $5 million, giving the team more room to sign free agents and draft picks.
Romo, who turns 33 next month and was entering the final year of his contract, gets $55 million guaranteed.
Super Bowl winner Joe Flacco got $52 million guaranteed in the six-year, $120.6 million contract he signed with Baltimore earlier this month.
Romo could be with Dallas through 2019, giving him a chance to be the starter longer than the 11 seasons of Aikman and seven of Staubach, who was a part-time starter his first four years with the Cowboys.
"In today's game, every NFL franchise understands the importance of production and continuity at the quarterback position, and, historically, few franchises have enjoyed those benefits more than the Dallas Cowboys," Jones said. "We are very confident in this investment and commitment."
Sources say Romo is on his way to Valley Ranch to sign the contract Friday afternoon.
Romo also lost playoff-or-bust games in regular-season finales the past two years. That included a loss to Washington last season when Romo threw an interception with a chance to tie or win the game with a drive in the final 3 minutes.
A former Romo rival, Donovan McNabb, questioned the deal on Twitter.
"Wow really, with one playoff win," McNabb wrote. "You got to be kidding me."
Dez Bryant, who teamed with Romo for career highs of 1,382 receiving yards and 12 touchdowns in 2012, tweeted, "Congrats Big Tony on the contract extension."
Romo is the franchise leader in touchdown passes and the single-season leader in touchdowns, passing yards, completions and attempts. He had a career-high 4,903 passing yards in 2012 but matched his highest interception total at 19 and had his lowest quarterback rating at 90.5.