Washington Redskins quarterback Robert Griffin III (10) throws a pass during the second half of an NFL football game against the Dallas Cowboys, Thursday, Nov. 22, 2012, in Arlington, Texas. The Redskins won 38-31. (AP Photo/The Waco Tribune-Herald, Jose Yau)

ARLINGTON, Texas (AP) -- Robert Griffin III threw for 311 yards and four touchdowns, helping the Washington Redskins beat the Dallas Cowboys 38-31 on Thursday.

The Heisman Trophy winner from Baylor made the Cowboys (5-6) look like an overmatched college team during the decisive second quarter in his first trip to Texas as a pro.

Griffin was 8 of 8 for 178 yards with three touchdowns to key the first 28-point quarter in 13 years for the Redskins (5-6). The rookie became the first Washington quarterback to throw four touchdown passes in consecutive games.

Tony Romo lost for the first time in six starts on Thanksgiving, despite a career-high 441 yards and three second-half touchdowns, including a career-long 85-yarder to Dez Bryant.