Question: The 2010 Washington Redskins began by having the selection of which offensive tackle who played at Oklahoma?

Context paragraphs:
Fred Washington (offensive tackle): Fred Earl Washington, Sr. (born June 14, 1944 in Marlin, Texas) was an American football offensive tackle in the National Football League for the Washington Redskins.  He played college football at the University of North Texas.  His son Fred Washington, Jr., a defensive tackle at Texas Christian University, was drafted by the Chicago Bears in the second round of the 1990 NFL Draft, but was killed in a car accident during his rookie season.

Chris Samuels: Chris Samuels (born July 28, 1977) is a former American college and professional football player who was an offensive tackle in the National Football League (NFL) for ten seasons.  He played college football for the University of Alabama, and was recognized as a consensus All-American.  Selected third overall in the 2000 NFL Draft, Samuels played his entire pro career for the NFL's Washington Redskins and was a six-time Pro Bowl selection.

Jon Jansen: Jonathan Ward Jansen (born January 28, 1976) is a former American football offensive tackle.  He previously played for the Washington Redskins and Detroit Lions of the National Football League.  He was drafted by the Washington Redskins in the second round of the 1999 NFL Draft.  He played college football at Michigan.

1984 Washington Redskins season: The 1984 Washington Redskins began with the team trying to improve on their 14–2 record from 1983.  Art Monk set an NFL record (since broken) for most receptions in a season.  The Redskins started the season losing their first two games, but would recover to win their next five games.  A mid season slump had them on the playoff bubble at 7-5.  However, the Redskins would finish the season in strong fashion winning their final four games to win the NFC East with an 11-5 record.  The Redskins quest for a third straight NFC Championship ended quickly as the Skins were stunned by the Chicago Bears 23-19 at RFK Stadium.

2010 Washington Redskins season: The 2010 Washington Redskins season was the 78th season for the team in the National Football League (NFL), and their first under new head coach Mike Shanahan, who also began his term as the team's Vice President of Football Operations.  The Redskins obtained the 4th pick in the 2010 NFL Draft as a result of their 4–12 record from their previous season, which they used to draft Oklahoma tackle Trent Williams.  Finishing the season 6–10, the Redskins improved on their 4–12 record from the 2009 season, but were officially eliminated from postseason contention in Week 14.  Of the 16 games of the season, only four (all losses) were decided by more than a single possession.

Trent Williams: Trent Williams (born July 19, 1988) is an American football offensive tackle for the Washington Redskins of the National Football League (NFL).  He played college football at Oklahoma, and was recognized as an All-American.  He was considered one of the best tackle prospects available for the 2010 NFL Draft, and was drafted fourth overall by the Redskins.

Vaughn Parker: Vaughn Antoine Parker (born June 5, 1971) is a former American football offensive tackle for the San Diego Chargers and Washington Redskins of the National Football League.  He played high school football at St. Joseph's Collegiate Institute in Buffalo, New York where he was named to the All-Western New York and All-Northeast teams.  Parker played college football at the University of California, Los Angeles (UCLA), where he became only the second offensive player in school history to be named to the all-conference team three times.  Parker was drafted in the second round (63rd overall) of the 1994 NFL Draft by the Chargers.  His rookie year, the Chargers won the AFC Championship and faced San Francisco in Super Bowl XXIX.  Parker spent ten seasons playing for the Chargers, with his final season (2003) there cut short by a season-ending knee injury.  He signed with the Redskins for the 2004 season and appeared in one game before being waived at the conclusion of the season.

1954 Washington Redskins season: The 1954 Washington Redskins began with the team trying to improve on their 6–5–1 record from 1953.  The Redskins sent defensive back Don Paul to the Cleveland Browns.  The Redskins acquired Paul from the Chicago Cardinals.  Upon his arrival in Washington, he fell in disfavour with George Preston Marshall of the Redskins.

Andre Johnson (offensive lineman): Andre T. Johnson (born August 25, 1973) is a former American football offensive tackle in the National Football League for the Washington Redskins (1996), the Miami Dolphins (1997), and the Detroit Lions (1997–1998).  He played college football at Penn State University and was selected in the first round of the 1996 NFL Draft by the Washington Redskins, who were looking for a replacement of their aging tackle Jim Lachey.  In his NFL career Johnson only played three games, each for the Lions and is usually considered to be one of the worst first round picks of all time.

Tackle (gridiron football position): Tackle is a playing position in American and Canadian football.  Historically, in the one-platoon system prevalent in the late nineteenth and early twentieth centuries, a tackle played on both offense and defense.  In the modern system of specialized units, offensive tackle and defensive tackle are separate positions, and the stand-alone term "tackle" refers to the offensive tackle position only.  The offensive tackle (OT, T) is a position on the offensive line, left and right.  Like other offensive linemen, their job is to block: to physically keep defenders away from the offensive player who has the football and enable him to advance the football and eventually score a touchdown.  The term "tackle" is a vestige of an earlier era of football in which the same players played both offense and defense.

Supporting paragraphs: 2010 Washington Redskins season Trent Williams
Answer: Trent Williams