Jan 13, 2008; Irving, TX; USA; Dallas Cowboys head coach Wade Phillips with offensive coordinator Jason Garrett on the sidelines against New York Giants in the NFC Divisional playoff game at Texas Stadium...

Dallas Cowboys offensive coordinator Jason Garrett and quarterback Tony Romo #9 during the Cowboys minicamp on May 14, 2007 in Irving, Texas...

Dallas Cowboys' Tony Romo (9) and offensive coordinator Jason Garrett, left, during the team's NFL football training camp in San Antonio, Wednesday, Aug. 5, 2009...

Sep 7, 2008; Cleveland, OH, USA; Dallas Cowboys assistant coach Jason Garrett on the sidelines against the Cleveland Browns at Cleveland Browns Stadium. Mandatory Credit: Matthew Emmons-US...

...22, 2009, Dallas Cowboys quarterback Tony Romo (9) walks back to the sideline as offensive coordinator Jason Garrett, right, views his play card during an NFL football game against the Washington Redskinsin Arlington, Texas...

Dallas Cowboys coach Wade Phillips, right, and offensive coordinator Jason Garrett, left, during NFL football training camp in San Antonio, Thursday, July 30, 2009. (AP Photo/Eric...

Steve Spagnuolo, Jason Garrett and Gregg Williams

09 December 2007 - Offensive coordinator Jason Garrett of the Dallas Cowboys during the Cowboys 28-27 win over the Detroit Lions at Ford...

Jason Garrett

Dec 9, 2007; Detroit, MI, USA; Dallas Cowboys offensive coordinator Jason Garrett on the sidelines against the Detroit Lions at Ford Field

...Tony Romo #9 of the Dallas Cowboys talks to head coach Wade Phillips and offensive coordinator Jason Garrett during a timeout against the Detroit Lions on December 9, 2007 at Ford Field in Detroit...

...Tony Romo #9 of the Dallas Cowboys talks to head coach Wade Phillips and offensive coordinator Jason Garrett during a timeout against the Detroit Lions on December 9, 2007 at Ford Field in Detroit...

Dallas Cowboys quarter back Tony Romo (9) with Jason Garrett, left, during training camp in San Antonio, Thursday, July 26, 2007. (AP Photo/Eric Gay

CHICAGO - OCTOBER 04: Jason McKie #37 of the Chicago Bears moves to block for teammate Garrett Wolfe #25 against the Detroit Lions on October 4, 2009 at...

CHICAGO - OCTOBER 04: Jason McKie #37 of the Chicago Bears moves to block for teammate Garrett Wolfe #25 against the Detroit Lions on October 4, 2009 at...