Question: In what event, featuring the Dolphins and the Redskins, did John Riggins participate in?

Context articles: T. D. (mascot)
True (artist)
Justice Waits
John Riggins
Namath: From Beaver Falls to Broadway
Super Bowl XVII
Larry Brown (tight end)
1982 Miami Dolphins season
Super Bowl VII
List of Kansas Jayhawks in the NFL Draft

T.D. (for The Dolphin) is the official mascot of the National Football League's Miami Dolphins.
 The Dolphins' official website jokingly states that T.D. was signed on April 18, 1997 by former head coach Jimmy Johnson.
 The Dolphins conducted a "Name the Mascot" contest that drew over 13,000 entries, covering all 50 states and 22 countries.
 528 names were suggested and the winning entry was announced at the annual Dolphins Awards Banquet on June 4, 1997.
 T.D. first appeared at a Dolphins home game on August 10, 1997 against the Chicago Bears; his first Dolphins home playoff appearance was January 2, 1999 in a win against the Buffalo Bills.
 He was selected to the Pro Bowl in 1999, 2001, 2003, 2004, 2010, 2012, 2014, 2016, and was the first NFL mascot to participate in the Hall of Fame Game in Canton, Ohio in 2001.
 He was invited to Hong Kong to participate in the 2005 Chinese New Year's Day Parade, and recently on May 2, 2015, T.D. was invited to participate at 2015 NFL Draft Town in Chicago, Illinois.
TRUE, formerly known as David John Riggins (b. 1968, Los Angeles, California) is an American artist, designer, and filmmaker of German-Russian, African-American, and Blackfoot descent who lives and works in New York City.
 He began using the word “TRUE” in place of his birth name in the mid-1990s.
 While his early work incorporated elements of illustration, graphic design, and animation, his current focus is filmmaking.
Justice Waits is a 2006 biography by Joel Davis about the 1980 murders of two UC Davis freshmen, John Riggins and Sabrina Gonsalves.
 Dubbed "The Sweetheart Murders", the case remained cold until August 27, 2002, when incriminating DNA evidence obtained from a blanket in the kidnappers' van proved that convicted child molester Richard Hirschfield was involved in the murders.
Robert John Riggins (born August 4, 1949), nicknamed "The Diesel" and "Riggo", is a former American football running back who played professionally in the National Football League (NFL) for the New York Jets and Washington Redskins.
 He was known for his powerful running style and productivity well into the latter years of his career; in 1983 at age 34, he rushed for an NFL single-season record 24 touchdowns, and again led the league in rushing touchdowns the following season at age 35.
 Although he had only one Pro Bowl appearance in his career, Riggins had his greatest success in the postseason, and was named the Most Valuable Player of Super Bowl XVII.
 Riggins was inducted into the Pro Football Hall of Fame in 1992.
Namath: From Beaver Falls to Broadway is a 2012 documentary film focusing on Pro Football Hall of Fame quarterback Joe Namath; he had stated that he was reluctant in joining the project, but subsequently stated his pleasure in doing so.
 The film was produced by NFL Films and HBO, and aired on the latter on January 28, 2012.
 The film documents Namath's early life in Beaver Falls, Pennsylvania, followed by his college football career at Alabama and career under Bear Bryant.
 The rest of the movie talked about Namath's career with the New York Jets, highlighted by his Super Bowl III win over the Baltimore Colts.
 The film also documents Namath's struggles with his alcoholism, which ended up leading to him going to drug rehabilitation.
 In the end, Namath discusses the possibility of returning to Beaver Falls to celebrate the 50th anniversary of his high school's state championship.
 Among those interviewed for the documentary include Namath's sister Rita Sims, brother Frank, daughter Jessica, former Jets Matt Snell, Don Maynard, John Schmitt, Richard Caster, Emerson Boozer and John Riggins, along with ESPN analyst Suzy Kolber, who was involved in an incident in 2003, in which a drunk Namath asked her to kiss him.
Super Bowl XVII was an American football game between the American Football Conference (AFC) champion Miami Dolphins and the National Football Conference (NFC) champion Washington Redskins to decide the National Football League (NFL) champion for the 1982 season.
 The Redskins defeated the Dolphins by the score of 27–17 to win their first Super Bowl championship.
 The game was played on January 30, 1983 at the Rose Bowl in Pasadena, California.
Larry Brown (born June 16, 1949) is a former American football player who played tight end and offensive tackle with the Pittsburgh Steelers of the National Football League.
 He played college football at the Kansas University, where he played on the ' 1968 Orange Bowl squad and was a teammate of future Pro Football Hall of Fame running back John Riggins and pro quarterback Bobby Douglass.
The 1982 Miami Dolphins season was the team's seventeenth in the National Football League.
 The team was coming off an unexpected 11-4-1 1981 season and a devastating loss to the San Diego Chargers in the Divisional Round the previous season in a game dubbed the Epic in Miami.
 The Dolphins had clinched the 2 seed and were picked by many to reach the Super Bowl during the 1981 season.
 Because of the high number of picks to reach the Super Bowl the previous season, many more fans picked them to win it during the 1982 season.
 The Dolphins looked to improve on their 11-4-1 record from 1981.
 However, a players strike cancelled 7 of the team's 16 games.
 Because of this, the NFL schedule was shrunk to 9 games.
 The Dolphins started out fresh, winning their first 2 games prior to the strike.
 When season play resumed 2 months later, the Dolphins defeated the Buffalo Bills 9-7 in Buffalo to clinch a 3-0 start.
 After a loss to Tampa Bay, they defeated the Minnesota Vikings 22-14.
 The next week, they lost a brisk game against the Patriots 3-0 in a game called the Snowplow Game.
 The Dolphins would then win 3 straight games to end the season 7-2, tied for 2nd in the AFC with the Cincinnati Bengals.
 The Dolphins won 2nd place over them by virtue of a series of tiebreakers.
 In the playoffs, they defeated the Patriots in a rematch by the score of 28-13.
 They then defeated the Chargers in a rematch of the 1981 Divisional Playoffs by a score of 34-13.
 In the AFC Championship game, they shutout the Jets, 14-0 to reach the Super Bowl for the first time since 1973.
 In Super Bowl XVII, they lost to the Redskins 27-17 in a rematch of Super Bowl VII which concluded Miami's perfect 1972 season.
Super Bowl VII was an American football game between the American Football Conference (AFC) champion Miami Dolphins and the National Football Conference (NFC) champion Washington Redskins to decide the National Football League (NFL) champion for the 1972 season.
 The Dolphins defeated the Redskins by the score of 14–7, and became the first and still the only team in NFL history to complete a perfect undefeated season.
 They also remain the only Super Bowl team to be shut out in the second half and still win.
 The game was played on January 14, 1973, at the Los Angeles Memorial Coliseum in Los Angeles, the second time the Super Bowl was played in that city.
 At kickoff the temperature was 84 F , making the game the warmest Super Bowl ever.
The University of Kansas Jayhawks football team has had 174 players drafted into the National Football League (NFL) since the first draft held in 1936, through the 2017 NFL Draft.
 KU has seen nine players taken in the first round, including six top-10 picks: Gale Sayers, John Riggins, Ray Evans, Mike Butler, John Hadl, and David Verser.
 Sayers, a College and Pro Football Hall of Famer, was the highest pick from KU as the fourth overall pick in the 1965 NFL Draft.