Question: The horse-collar tackle is closely associated with what safety who played college football for the University of Oklahoma?

full_context: Document 1: Antrel Rolle: Antrel Rocelious Rolle (born December 16, 1982) is a former American football safety of the National Football League (NFL). He played college football at the University of Miami, where he was recognized as a unanimous All-American, and was drafted by the Arizona Cardinals eighth overall in the 2005 NFL Draft. Rolle also played for the Chicago Bears and New York Giants, winning Super Bowl XLVI with New York in 2011.
Document 2: 2007 New England Patriots videotaping controversy: The 2007 New England Patriots videotaping controversy, widely dubbed "Spygate", refers to an incident during the National Football League's (NFL) 2007 season when the New England Patriots were disciplined by the league for videotaping New York Jets' defensive coaches' signals from an unauthorized location during a September 9, 2007 game. Videotaping opposing coaches is not illegal in the NFL de jure, but there are designated areas allowed by the league to do such taping. Because the Patriots were instead videotaping the Jets' coaches from their own sideline during the game, NFL Commissioner Roger Goodell deemed it to be in violation of league rules, stating that the act represented a calculated and deliberate attempt to avoid long-standing rules designed to encourage fair play and promote honest competition on the playing field. After an investigation, the NFL fined Patriots head coach Bill Belichick $500,000 (the maximum allowed by the league and the largest fine ever imposed on a coach in the league's 87-year history) for his role in the incident, fined the Patriots $250,000, and docked the team their original first-round selection in the 2008 NFL Draft which would have been the 31st pick of the draft. The fine garnered significant media attention for being the "maximum amount" an individual could be fined.
Document 3: Roy Williams (safety): Roy Lee Williams (born August 14, 1980), is a former American college and professional football player who was a safety in the National Football League (NFL) for nine seasons. He played college football for the University of Oklahoma, and was recognized as a unanimous All-American. He was drafted by the Dallas Cowboys eighth overall in the 2002 NFL Draft, and played professionally for the Cowboys and Cincinnati Bengals. He earned five straight Pro Bowl selections from 2003 to 2007. Williams is currently a sideline reporter for Oklahoma football games.
Document 4: 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.
Document 5: Willie Williams (cornerback, born 1970): Willie James Williams (born December 26, 1970) is a former American football cornerback in the National Football League and current Head coach for Winston Churchill High School. He was drafted out of Western Carolina University by the Pittsburgh Steelers in 1993, and spent the first 4 seasons of his 13-year career in Pittsburgh. He was a key member of the 1995 Steelers team that played in Super Bowl XXX. From 1997 to 2003, Williams played for the Seattle Seahawks, before returning to the Steelers for the 2004 and 2005 seasons. Williams had a much smaller role in 2005, but still posted 10 tackles, adding to his career totals of 602 tackles and 26 interceptions. Williams has the distinction of being the only player from the 1995 Steelers Super Bowl XXX roster to be a member of the 2005 Steelers Super Bowl XL roster. The Steelers defeated the Seahawks in that game 21-10 (though Williams was not active in Super Bowl XL, and did not dress with pads). He is also the cousin of Tamera Young of the Atlanta Dream (WNBA).
Document 6: Kyle Turley: Kyle John Turley (born September 24, 1975) is a former American football offensive lineman who played eight seasons in the National Football League (NFL). Selected 7th overall in the 1998 NFL draft, Turley played five seasons for the New Orleans Saints and a year with the St. Louis Rams before a serious back injury sidelined him for the 2004 and 2005 seasons. He returned to football in 2006 as a member of the Kansas City Chiefs, where he spent the last two years of his career before announcing his retirement in December 2007. Turley's high level of play earned him All-Pro honors for the 2000 season and a Pro Bowl invite following the 2001 season. His career is best remembered by many for a 2001 incident in which he ripped off an opposing player's helmet and tossed it downfield, playing a key factor in his team losing the game but also earning the respect of many Saints fans for his defense of the quarterback. Turley played college football at San Diego State.
Document 7: Ricky Williams: Errick Lynne "Ricky" Williams Jr. (born May 21, 1977) is a retired American football running back who played twelve seasons in the National Football League (NFL) and one season in the Canadian Football League (CFL). He played college football for the University of Texas, where he was a two-time All-American and won the Heisman Trophy. Williams was drafted by the New Orleans Saints fifth overall in the 1999 NFL Draft and spent three seasons with the team before he was traded to the Miami Dolphins in 2002. He played for the Dolphins for two seasons, and retired for the first time from football in 2004. Due to his suspension from the NFL in 2006, he played for the Toronto Argonauts that year. Williams re-joined the Dolphins in 2007 and played with them until 2010, and spent the 2011 season with the Baltimore Ravens. He was formerly an assistant football coach at the University of the Incarnate Word and is currently a football analyst for ESPN's Longhorn Network. In 2015, Williams was inducted into the College Football Hall of Fame.
Document 8: Darren Sharper: Darren Mallory Sharper (born November 3, 1975) is a former American football safety and former broadcaster. He played in the National Football League (NFL) for fourteen seasons before which Sharper played college football for the College of William & Mary. He was drafted by the Green Bay Packers in the second round of the 1997 NFL Draft, and later played for the Minnesota Vikings and New Orleans Saints. Sharper was a five-time Pro Bowl selection, and was named to the NFL's 2000s All-Decade Team. He finished his career with 63 interceptions, sixth on the NFL's all-time leader list at the time of his retirement. His 13 defensive touchdowns are tied for the most all-time. In 2016, Sharper was sentenced to 20 years in prison after pleading guilty to multiple rape and drug-related charges.
Document 9: Horse-collar tackle: The horse-collar tackle is an American football maneuver in which a defender tackles another player by grabbing the back collar or the back-inside of an opponent's shoulder pads and pulling the ball carrier directly downward in order to pull his feet from underneath him. The technique is most closely associated with Pro Bowl safety Roy Williams. This kind of tackle was banned from the NFL during the 2005 off-season. The rule forbidding it is often referred to in the press as "The Roy Williams Rule". The rule, with modifications, was adopted in college football in 2008 and high school football in 2009.
Document 10: Willie Roaf: William Layton Roaf (born April 18, 1970), nicknamed "Nasty," is a former American college and professional football player who was an offensive tackle in National Football League (NFL) for thirteen seasons. He played college football for Louisiana Tech University, and earned consensus All-American honors. He was a first-round pick in the 1993 NFL Draft, and played professionally for the New Orleans Saints and Kansas City Chiefs of the NFL. An eleven-time Pro Bowl selection and nine-time All-Pro, he was enshrined in the Pro Football Hall of Fame in 2012 and the College Football Hall of Fame in 2014.
Document 11: Chicken fight: Chicken fight, also known as shoulder wars, is an informal game, often played in a lake or swimming pool, characterized by one team member sitting on the shoulders of his or her teammate or riding piggy-back. The object of the game is to knock down or separate an opposing team through team effort. The person on top is considered to be the "attacker" while the person below is considered to be the "vehicle". The person below may not use arms or hands and must rely on momentum to attack by running into the other team. The person on his/her shoulders is the "attacker" and may use any means possible of separating the other team or knocking them to the ground. If a team is separated or knocked down in any way, they are required to resign from the game and the last team to remain together is considered the winner. It is not uncommon for this game to be banned in many swimming pools due to safety concerns.
Document 12: Billy Sims: Billy Ray Sims (born September 18, 1955) is a former American college and professional football player who was a running back in the National Football League (NFL) for five seasons during the 1980s. Sims played college football for the University of Oklahoma, where he was a two-time consensus All-American, and won the Heisman Trophy in 1978. He was the first overall pick in the 1980 NFL Draft, and played professionally for the NFL's Detroit Lions. Sims was the last Oklahoma player taken Number 1 overall in the NFL Draft until quarterback Sam Bradford was taken first in the 2010 NFL Draft. He was given the nickname "Kung Fu Billy Sims" by ESPN's Chris Berman, after a game where the Detroit Lions played the Houston Oilers. In the NFL Films highlight, rather than be tackled during a rushing attempt, Sims ran at, jumped, and, while fully airborne, kicked Oilers Cornerback Steve Brown in the head.
Document 13: Lee Roy Selmon: Lee Roy Selmon (October 20, 1954 – September 4, 2011) was an American football player and college athletics administrator. He played college football as a defensive tackle at the University of Oklahoma, the youngest of three Selmon brothers to play football there.
Document 14: Soccer kick: A soccer kick, also known as a soccer ball kick in puroresu and shoot fighting, is a reference to a kick that is similar to kicks used in association football. It is the colloquial term for a kick performed against a prone, kneeling, rising or supine opponent by a fighter who is in a standing or semi-standing position, to any part of a downed opponent. The soccer kick was used in the first match of the Ultimate Fighting Championship at UFC 1 in 1993. Gerard Gordeau defeated Teila Tuli with a soccer kick, which also knocked out one of Tuli's teeth. The technique is banned under the Unified Rules of Mixed Martial Arts however other rulesets, including the ones used by Pride Fighting Championships do permit them. Soccer kicks have been regularly discussed as to potential damage. There has been a regular debate on the usage of them within MMA. Some MMA fans and fighters support them while a fight doctor and politicians have opposed them.
Document 15: Holding the man: Holding the man is an infringement in the game of Australian rules football. This occurs when a player is tackling his opponent without the ball. If the team whose player committed the infringement plays on, then a free kick will be awarded. However, if the team whose player was tackled without the ball plays on, then the advantage is paid.
ground_truth: Roy Lee Williams