Early years

Dockery was born in Dallas County, Texas. He graduated from Lakeview Centennial High School in Garland, Texas, where he played high school football for the Lakeview Patriots. He was tabbed as a second-team All-USA offensive lineman by USA Today, and second-team Class 5A all-state selection by the Texas Sports Writers Association in 1998. He was a two-time first-team all-district performer at offensive tackle.

College career

Dockery attended the University of Texas at Austin, and played for coach Mack Brown's Texas Longhorns football team from 1999 to 2003. As a freshman in 1999, He served as a backup guard, but saw action in all 14 games, including the Cotton Bowl Classic, at both guard spots and on special teams. In 2000, Dockery played in all 12 games, including the Holiday Bowl. He helped pave the way for a Longhorns offense that averaged 38.6 points per game. In 2001, He played in all 13 games, including the Holiday Bowl, and started nine contests at both guard spots, also seeing action at tackle. His line play contributed to the Longhorns leading the Big 12 Conference with 39.2 points per game (sixth in NCAA) and averaging 162.3 yards rushing, 250.3 passing, and 412.6 total yards per game. As a senior in 2002, Dockery started all 13 games, seven at right guard and six at right tackle. Following the season, he was a first-team All-Big 12 selection, and was recognized as a consensus first-team All-American, after receiving first-team honors from the Associated Press, Football Writers Association of America and Walter Camp Football Foundation. He shared the Longhorns' Outstanding Offensive Lineman Award and was a key member of a Longhorn offense that ranked fifth in the Big 12 and 16th nationally in scoring offense (33.8 points per game).

Professional career

Pre-draft measurables

Ht	Wt	Arm length	Hand size	40-yd dash	10-yd split	20-yd split	20-ss	3-cone	Vert	Broad	BP	Wonderlic
6 ft 6 in	347 lb	351⁄8 in	101⁄8 in	5.35 s					25 in	7 ft 8 in		13

First stint with Redskins

Dockery was chosen in the 2003 NFL Draft by the Washington Redskins. In 2003, he began his rookie season as a backup at several positions along the offensive line, including left guard and right tackle. He was inserted into the starting lineup in Week 4 against the New England Patriots at left guard, which was his first career NFL start. He would go on to start the final 13 games of the regular season at left guard. In 2004, Started all 16 games at left guard for the Redskins, teaming with left tackle Chris Samuels to form a solid tandem on the left side of the offensive line. He finished the season with 29 consecutive starts at left guard, even though he is one of the league leaders in false starts.

Famous ESPN sportscaster Chris Berman gave Dockery one of his famous nicknames: Derrick "Hickory Dickory" Dockery.

Buffalo Bills

On March 2, 2007, the Buffalo Bills signed Dockery to a 7-year, $49 million contract with $18 million signing bonus, the third largest in NFL history at his position. He was released on February 26, 2009.

Second stint with Redskins

Dockery re-signed with the Washington Redskins to a 5-year, $26.5 million contract on February 27, 2009. He was expected to start at left guard to replace free agent Pete Kendall. In a game against the Tennessee Titans, he injured his left knee. Dockery was released on March 1, 2011.

Dallas Cowboys

Dockery was signed by the Dallas Cowboys on September 4, 2011. He was re-signed on August 3, 2012.

[ Source: Wikipedia ]