Super Bowl XXI was an American football game between the American Football Conference (AFC) champion Denver Broncos and the National Football Conference (NFC) champion New York Giants to decide the National Football League (NFL) champion for the 1986 season.
 The Giants defeated the Broncos by the score of 39–20, winning their first ever Super Bowl, and their first NFL title since 1956.
 The game was played on January 25, 1987, at the Rose Bowl in Pasadena, California.
Super Bowl XLVIII was an American football game between the American Football Conference (AFC) champion Denver Broncos and National Football Conference (NFC) champion Seattle Seahawks to decide the National Football League (NFL) champion for the 2013 season.
 The Seahawks defeated the Broncos 43–8, the largest margin of victory for an underdog and tied for the third largest point differential overall (35) in Super Bowl history with Super Bowl XXVII (1993).
 It was the first time the winning team scored over 40 points, while holding their opponent to under 10.
 This became the first Super Bowl victory for the Seahawks and the fifth Super Bowl loss for the Broncos, the most of any team.
 The game was played on February 2, 2014, at MetLife Stadium at the Meadowlands Sports Complex in East Rutherford, New Jersey, the first Super Bowl played outdoors in a cold-weather city and the first Super Bowl to be played on a February 2.
Phillip Martin Simms (born November 3, 1955) is a former American football quarterback who spent his entire 14-year professional career playing for the New York Giants of the National Football League (NFL).
 He is currently a television sportscaster for the CBS network.
 After playing college football at Morehead State University, Simms was drafted in the first round by the New York Giants of the National Football League (NFL) with the number seven selection overall in the 1979 NFL Draft.
 Simms was named Most Valuable Player (MVP) of Super Bowl XXI, after he led the Giants to a 39–20 victory over the Denver Broncos and set the record for highest completion percentage in a Super Bowl, completing 22 of 25 passes (88%).
 He also was named to the Pro Bowl for his performances in the 1985 and 1993 seasons.
Andre Townsend (born October 8, 1962 in Chicago, Illinois) is a former defensive end who played 7 seasons for the Denver Broncos in the National Football League.
 He started in Super Bowl XXI and Super Bowl XXII.
The 1986 NFL season was the 67th regular season of the National Football League.
 The defending Super Bowl Champion Chicago Bears shared the league's best record with the Giants at 14-2, with the Giants claiming the spot in the NFC by tiebreakers.
 In the AFC, the Cleveland Browns earned home-field advantage with a record of 12-4, and they hosted the New York Jets in round one of the AFC playoffs.
 The Jets had started the season at 10-1 before losing their final five contests.
 The game went to double OT, with the Browns finally prevailing 23-20.
 The following Sunday, John Elway and the Denver Broncos defeated the Browns by an identical score in the game known as The Drive, where Elway drove his team 98 yards to send the game to overtime to win.
 The Giants would defeat their rival Washington Redskins in the NFC title game, blanking them 17-0 to advance to their first Super Bowl.
 The season ended with Super Bowl XXI when the New York Giants defeated the Denver Broncos 39-20 at the Rose Bowl to win their first league title in 30 years.
Thomas Louie Jackson, also referred to as "TJ" or "Tommy", (born April 4, 1951) is a former NFL linebacker for the Denver Broncos, where he was part of the "Orange Crush Defense".
 Jackson was a major component in the defense which led the Broncos to Super Bowl XXI against the New York Giants.
 After his playing career ended, he enjoyed a successful 29-year run as an NFL analyst for ESPN.
 He was given the Pete Rozelle Award for excellence in broadcasting by the Pro Football Hall of Fame in 2015.
Jerry Markbreit (born March 23, 1935) is a former American football referee in the National Football League (NFL) for 23 seasons and became one of the most recognizable referees in the game.
 Markbreit officiated football games for 43 seasons.
 From 1965 to 1975, Markbreit officiated college football games in the Big Ten Conference.
 He then joined the NFL in 1976 as a line judge before being promoted to the head referee position in just his second year.
 His uniform number in the league was 9, which is now worn by Mark Perlman.
 Until he retired from the NFL after the 1998 season, Markbreit officiated in two wild card (1991 and 1994), ten divisional (1979, 1981, 1982, 1985, 1986, 1987, 1988, 1995, 1997, and 1998), eight conference championship (1980, 1983, 1984, 1989, 1990, 1992, 1993, and 1996) playoff games, one Pro Bowl (1978), and four Super Bowls: Super Bowl XVII, Super Bowl XXI, Super Bowl XXVI, and Super Bowl XXIX and was an alternate in Super Bowl XIX, Super Bowl XXII, and Super Bowl XXVIII.
 To date, he is the only NFL head referee to officiate four Super Bowl games.
Freddie Gilbert (born April 8, 1962 in Griffin, Georgia) is a former defensive end who played 3 seasons for the Denver Broncos in the National Football League.
 He played for the Broncos in Super Bowl XXI and Super Bowl XXII.
 Previously, he also played for the New Jersey Generals of the United States Football League.
 He now resides in Athens, Georgia.
The 1986 New York Giants season was one of the most successful seasons in the professional football franchise's history.
 The New York Giants, who play in the National Football Conference (NFC) of the National Football League (NFL), won their fifth championship—and first Super Bowl—in franchise history during the season.
 Led by consensus league Most Valuable Player (MVP) linebacker Lawrence Taylor and Super Bowl MVP quarterback Phil Simms, the Giants posted a 14–2 record during the regular season, tied for the best record in the league with the defending Super Bowl champion Chicago Bears and the best in team history.
 The Giants improved on their 10–6 record from 1985, won their first division championship since the NFL-AFL merger in 1970, and won Super Bowl XXI against the Denver Broncos.
Joe Rizzo (born December 17, 1950 in Glen Cove, New York) is a former linebacker of the Denver Broncos.
 He played for the Broncos from 1974 to 1980 and was a starter in Super Bowl XII and member of the Orange Crush Defense.
 He had 9 career interceptions.
 He was part of one of the most dominant linebacking corps in NFL history.
 Known as the Orange Crush, it consisted of, Joe Rizzo, Randy Gradishar, Tom Jackson and Bob Swenson.
 The corp was named the 9th best linebacking corps in NFL history by nfl.com.
 Joe was also voted by Bronco fans as one of the top 10 linebackers in the 50-year history (1959-2009) of the Denver Broncos.

Question: Joe Rizzo was part of a defensive group from the Denver Broncos that led them to Super Bowl XXI against which team?
Answer: New York Giants