Question: What was the name of the older brother who became the first African-American announcer to call play-by-play of a major sports championship in the United States, of currently a play-by-play broadcaster for the "NFL on CBS" alongside a former American football quarterback who earned a Super Bowl ring with the Rams and was selected to two Pro Bowls with the Chiefs?

Context articles: Gary Stein
Trent Green
2010–11 Dallas Mavericks season
Jerry Markbreit
Dré Bly
Joe Montana
Johnny Grier
John Kuhn
Greg Gumbel
Matt Cavanaugh

Gary Stein is a sportscaster currently living in Baltimore, Maryland.
 He broadcasts for CBS Radio and Terrapin Sports Radio in Baltimore.
 He hosts the weekly Gary Stein Show, every Saturday on 105.7 the Fan.
 In addition, he hosts the Maryland Terrapins' Toyota Tailgate pre- and post-game show on ESPN Radio 1300 and Sports Radio 105.7 the Fan.
 During Ravens home games he serves as the press box public address announcer.
 Gary also does play-by-play for Baltimore Blast soccer on television, the radio, and webcasts.
 He has worked Blast games worldwide on Fox Soccer Channel, as well as locally on Maryland Public Television and WMAR TV.
 Stein serves as the play-by-play broadcaster for UMBC Retrievers Basketball and Lacrosse on the Retrievers Radio Network.
 Gary has worked as the sports anchor for "The Ed Norris Show", which airs on 105.7 The Fan in Baltimore.
 While working on "The Kirk and Mark Show" (prior to "The Ed Norris Show") Gary was given the nickname "The Hairy Back of Sports".
 Additionally, Gary also works for the NFL as the press box PA announcer at the Super Bowl.
 He has worked all Super Bowls from Super Bowl XXXIX through the most recent game, Super Bowl XLVII in New Orleans.
Trent Jason Green (born July 9, 1970) is a former American football quarterback who played in the National Football League (NFL) for fifteen seasons.
 He played college football for Indiana University.
 He was drafted by the San Diego Chargers in the eighth round of the 1993 NFL Draft, and also played for the BC Lions, Washington Redskins, St. Louis Rams, Kansas City Chiefs and Miami Dolphins.
 He earned a Super Bowl ring with the Rams and was selected to two Pro Bowls with the Chiefs.
The 2010–11 Dallas Mavericks season was the 31st season of the franchise in the National Basketball Association (NBA).
 The Mavericks won the NBA Championship after defeating the Miami Heat in 6 games in the 2011 NBA Finals.
 The Mavs playoff run came with a 6-game first round series against the Portland Trail Blazers, a series in which the Mavericks blew a 23-point lead in Game 4, but still won the series.
 In the conference semi-finals, the Mavericks run was motivated with a sweep of the champions of the previous two seasons, the Los Angeles Lakers.
 The series against the Lakers also became the birth of the Mavericks Royal Blue-Out games in the AAC, with almost all fans wearing T-shirts that read "The Time is Now".
 In the Western Conference Finals against the Oklahoma City Thunder, the Mavericks won the last 3 games winning by 4th quarter comebacks, to win their second Western Conference Championship, and a trip to the NBA Finals for the first time since 2006, with a rematch against the Heat.
 Following a disappointing Game 1, the Mavericks pulled the biggest comeback in NBA Finals history in Game 2 to even the series at 1 game each.
 After a loss in Game 3, the Mavericks won the last two games in Dallas to take a 3–2 series lead heading to Game 6 in Miami.
 The Mavericks won their first NBA Championship in Game 6 to clinch the first major sports championship in the Dallas-Fort Worth area since the Dallas Stars in 1999, and the first title in Mavericks franchise history.
 The Mavericks are the third team to win an NBA title in the state of Texas, joining the Houston Rockets and San Antonio Spurs.
 The Mavericks are also the third team to win a major sports championship in the Dallas-Fort Worth area, joining the Dallas Cowboys' five Super Bowl titles and the Dallas Stars' only Stanley Cup, leaving the Texas Rangers as the only team to not win a major sports title in the area, as they have not won the World Series.
 The Mavericks championship parade was held on June 16, 2011 in downtown Dallas.
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.
Donald André "Dré" Bly (born May 22, 1977) is a retired American college and professional football player who was a cornerback in the National Football League (NFL) for eleven seasons.
 He played college football for the University of North Carolina (UNC), and earned All-American honors twice.
 Bly was drafted by the St. Louis Rams in the second round of the 1999 NFL Draft, and spent four seasons with the Rams, earning a Super Bowl ring with them in Super Bowl XXXIV over the Tennessee Titans.
 He was selected to two Pro Bowls during his four-year tenure with the Detroit Lions, and also played for the Denver Broncos and San Francisco 49ers.
Joseph Clifford Montana Jr. (born June 11, 1956), nicknamed "Joe Cool" and "The Comeback Kid", is a former American football quarterback who played in the National Football League (NFL) for 16 seasons, primarily with the San Francisco 49ers and then with the Kansas City Chiefs for the final two seasons of his NFL career.
 After winning a college national championship at Notre Dame, Montana started his NFL career in 1979 with San Francisco, where he played for the next 14 seasons.
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 While a member of the 49ers, Montana started and won four Super Bowls and was the first player ever to have been named Super Bowl Most Valuable Player three times.
 He also holds Super Bowl career records for most passes without an interception (122 in 4 games) and the all-time highest quarterback rating of 127.8.
 Montana was elected to the Pro Football Hall of Fame in 2000, his first year of eligibility.
Johnny Grier is a former American football official for 23 years in the National Football League (NFL) from 1981 to 2004.
 He began in the NFL as a field judge before becoming the first African-American referee in the history of the NFL with the start of the 1988 NFL season.
 Grier has officiated in one Super Bowl, Super Bowl XXII in 1988, which was his last game as a field judge and the same game in which Doug Williams became the first African-American quarterback to win the Super Bowl.
 On the field, he wore uniform number 23, which is now worn by Jerome Boger, another African-American referee.
John Allen Kuhn (born September 9, 1982) is an American football fullback for the New Orleans Saints of the National Football League (NFL).
 After playing college football for Shippensburg University, he was signed by the Pittsburgh Steelers as an undrafted free agent in 2005.
 Kuhn earned a Super Bowl ring as a member of the Steelers in Super Bowl XL.
 He earned a second ring with the Green Bay Packers, against his former team, five years later in Super Bowl XLV.
 He has played in three Pro Bowls.
Greg Gumbel (born May 3, 1946) is an American television sportscaster.
 He is best known for his various assignments on the CBS network (most notably, the National Football League and NCAA basketball).
 The older brother of news and sportscaster Bryant Gumbel, he became the first African-American (and Creole) announcer to call play-by-play of a major sports championship in the United States when he announced Super Bowl XXXV for the CBS network in 2001.
 He is of Creole ancestry.
 Gumbel is currently a play-by-play broadcaster for the "NFL on CBS" alongside Trent Green as well as the studio host for CBS' men's college basketball coverage.
Matthew Andrew Cavanaugh (born October 27, 1956) is an American football coach and former player who is the offensive coordinator for the Washington Redskins of the National Football League (NFL).
 He is a former American football quarterback in the NFL who played from 1978 to 1991.
 In the course of his career as a professional football player, he earned two Super Bowl rings.
 Since his retirement, Cavanaugh has worked as an offensive coach and coordinator, for teams including the San Francisco 49ers, the Chicago Bears, and the Baltimore Ravens, where he earned a third Super Bowl ring as a coach.