Question: Who won the 2009 Dr Pepper Big 12 Championship Game for the team which was coached by Mack Brown with a last second field goal?

Context paragraphs:
The Kick (college football): The Kick refers to Uwe von Schamann's last second field goal in a September 24, 1977 college football game between the Oklahoma Sooners and Ohio State Buckeyes at Ohio Stadium in Columbus, Ohio.  Make or miss, his field goal attempt would have been the last play of the game.  This kick turned out to be the only last-second Oklahoma win in Barry Switzer's coaching career at Oklahoma.  The kick eventually went down in Sooners' lore as one of the most memorable plays in Oklahoma history.

2005 Big 12 Championship Game: The 2005 Dr. Pepper Big 12 Championship Game was held at Reliant Stadium on December 3, 2005.  The game saw the Big 12 South champions Texas Longhorns take on the Colorado Buffaloes, winners of the Big 12 North.  Texas, undefeated and at #2 in the BCS standings, was looking to travel to the national championship.

1996 Big 12 Championship Game: The 1996 Dr Pepper Big 12 Championship Game was held on December 7, 1996, at The Dome at America's Center, then known as Trans World Dome, in St. Louis, Missouri.  The divisional winners from the Big 12 Conference squared off in the 1st edition of the game.  The Texas Longhorns represented the South Division and the Nebraska Cornhuskers represented the North Division.  Texas won the contest 37–27, keyed by a daring 4th down conversion from their own 28-yard line with slightly more than 2 minutes left in the 4th quarter when the score was 30–27 in their favor.

2006 Big 12 Championship Game: The 2006 Dr. Pepper Big 12 Championship Game was held on December 2, 2006 at Arrowhead Stadium in Kansas City, Missouri, and pit the divisional winners from the Big 12 Conference: the Nebraska Cornhuskers, winner of the North division against the Oklahoma Sooners, winner of the South division.  The Sooners defeated the Cornhuskers, 21-7.  This was the first time the two teams had ever met in the Big 12 conference championship game.

2009 Big 12 Championship Game: The 2009 Dr Pepper Big 12 Championship Game was held on December 5, 2009 at Cowboys Stadium in Arlington, Texas.  The divisional winners from the Big 12 Conference squared off in the 14th edition of the game.  The Texas Longhorns represented the South Division and the Nebraska Cornhuskers represented the North.  Texas won 13–12 on a last second field goal by placekicker Hunter Lawrence.

2009 Texas Longhorns football team: The 2009 Texas Longhorn football team (variously "Texas" or "UT" or the "Horns") represented the University of Texas at Austin in the 2009 NCAA Division I FBS football season.  The team was coached by Mack Brown.  Texas played their home games in Darrell K Royal–Texas Memorial Stadium.

Dublin Dr Pepper: Dublin Dr Pepper was the popular name for a style of Dr Pepper soft drink made by the Dublin Dr Pepper Bottling Company in Dublin, Texas.  Dublin Dr Pepper followed the original recipe, using cane sugar as the sweetener as opposed to newer high fructose corn syrup (HFCS).  The Dublin plant formula's use of sugar made it popular among soda fans.  According to the corporate headquarters at Dr Pepper Snapple Group, this resulted in clashes with other bottlers and the parent company of Dr Pepper.  On 12 January 2012, it was announced that Dublin Dr. Pepper will no longer be produced, after the Dublin Dr Pepper Bottling Company settled the trademark dispute instigated by Dr Pepper Snapple Group.

2004 Big 12 Championship Game: The 2004 Dr Pepper Big 12 Football Championship Game was played on December 4, 2004 in Arrowhead Stadium in Kansas City, Missouri.  The game determined the 2004 football champions of the Big 12 Conference.  The #2 Oklahoma Sooners defeated the Colorado Buffaloes 42-3.

2010 Big 12 Championship Game: The 2010 Big 12 Championship Game was played at 7:00 p.m. on Saturday, December 4, 2010, at AT&T Stadium, then known as Cowboys Stadium, in Arlington, Texas to determine the 2010 football champion of the Big 12 Conference.  At that time, it was the final championship game for the conference as two members of the Big 12 had announced their intentions to leave the conference.  The South Division was represented by Oklahoma and the North Division was represented by Nebraska.  Oklahoma defeated Nebraska 23-20 to win the final Big 12 Championship and claim their seventh Big 12 Title.  It was Oklahoma's eighth appearance in the game.

2003 Big 12 Championship Game: The 2003 Big 12 Football Championship Game was played on December 6, 2003 in Arrowhead Stadium in Kansas City, Missouri.  The game determined the 2003 football champion of the Big 12 Conference.  The Oklahoma Sooners, winners of the South division of the Big 12, were upset by the Kansas State Wildcats, who won the North division, by a score of 35–7.  This was the second time the two teams met in the Big 12 Championship Game.  The first was the 2000 Big 12 Championship Game, a game in which Oklahoma won 27-24.

Supporting paragraphs: 2009 Big 12 Championship Game 2009 Texas Longhorns football team
Answer: Hunter Lawrence