Question: Which one of the National Basketball Retired Players Association founders played for the Cincinnati Royals and Milwaukee Bucks?

full_context: Document 1: 1961–62 Cincinnati Royals season: The 1961/62 season was the Royals 14th season in the NBA and its fifth in Cincinnati. Oscar Robertson had a career season as he averaged a triple double on the season. All 5 starters on the Royals averaged double digits points per games as the team ended a 4-year playoff drought. The Royals had a record of 43–37 and the improving team finished in 2nd place. Despite that, the NBA team had real local competition for fans in The Queen City due to remarkably successful college teams there. The starting five of the team had improved, with Bob Boozer improving to join solid holdovers Oscar Robertson, Jack Twyman, Wayne Embry, Bucky Bockhorn. In the playoffs, the Royals dealt with injuries and would be defeated by the Detroit Pistons in 4 games.
Document 2: List of NBA players with most championships: This is a list of NBA players with most championships won as a player. The National Basketball Association (NBA) is a major professional basketball league in North America. It was founded in 1946 as the Basketball Association of America (BAA). The league adopted its current name at the start of the when it merged with the National Basketball League (NBL). The NBA Finals is the championship series for the NBA and the conclusion of the sport's postseason. The winning team of the series receives the Larry O'Brien Championship Trophy. Players from the winning team usually receive championship rings from the team honoring their contribution. However, in some rare occasion, the teams opted to give other commemorative items, such as wrist watches, instead of rings. The number of championships won by NBA superstars is often used as a measurement of their greatness.
Document 3: Russell Westbrook: Russell Westbrook III (born November 12, 1988) is an American professional basketball player for the Oklahoma City Thunder of the National Basketball Association (NBA). He is a six-time NBA All-Star, and a two-time NBA All-Star Game Most Valuable Player, winning consecutive awards in 2015 and 2016. He is also a six-time All-NBA Team member and led the league in scoring in 2014–15 and 2016–17. In 2017, Westbrook became one of two players in NBA history to average a triple-double for a season, along with Oscar Robertson in 1962. He also set a record for the most triple-doubles in a season, with 42. He was subsequently named the 2016–17 NBA Most Valuable Player.
Document 4: Jerry Lucas: Jerry Ray Lucas (born March 30, 1940) is an American former basketball player and memory education expert. He was a nationally-awarded high school player, national college star at Ohio State, and 1960 gold medal Olympian and international player before starring as a professional player in the National Basketball Association (NBA). As a collegian, Lucas led the Ohio State Buckeyes to the 1960 college national championship and three straight NCAA finals. He remains today the only three-time Big Ten Player of the Year, and was also twice named NCAA Player of the Year. As a professional, Lucas was named All-NBA First Team three times, a NBA All-Star seven times, was 1964 NBA Rookie of the Year, and was named Most Valuable Player of the 1965 NBA All-Star Game among other honors and awards. He was inducted to the Naismith Memorial Basketball Hall of Fame in 1980.
Document 5: 50 Greatest Players in NBA History: The 50 Greatest Players in National Basketball Association History (also referred to as NBA's 50th Anniversary All-Time Team or NBA's Top 50) were chosen in 1996 to honor the fiftieth anniversary of the founding of the National Basketball Association (NBA). These fifty players were selected through a vote by a panel of media members, former players and coaches, and current and former general managers. In addition, the top ten head coaches and top ten single-season teams in NBA history were selected by media members as part of the celebration. The fifty players had to have played at least a portion of their careers in the NBA and were selected irrespective of position played.
Document 6: 1970–71 Cincinnati Royals season: After trading Oscar Robertson, the Royals became a quick, young team. Some players included Norm Van Lier, a second-year guard who would lead the league in assists with 10.1 assists per game. Draft picks Sam Lacey and Nate "Tiny" Archibald were new additions to the team. The Royals would continue its fast-breaking, high-scoring ways. During the season, they were held below 100 points only four times all season. The Royals also broke the 130 point mark an astounding 11 times. The team's 116.0 scoring average was good for 3rd place in the NBA. Bob Cousy, the Royals coach was not defensive minded, and opposing teams racked up an average of 119.2 points per game. The Royals finished the season in 3rd place in the newly formed Central Division. The Royals would finish the season with a record of 33 wins, compared to 49 losses.
Document 7: Arnie Fielkow: Arnie Fielkow is currently the CEO and President of the Jewish Federation of Greater New Orleans. Until June of 2017, he was the President and CEO of the National Basketball Retired Players Association (NBRPA). Fielkow was formerly a Democratic politician in New Orleans. In November 2006, he won a seat on the New Orleans City Council as a Member at-large, and served as City Council President. He was reelected in 2010. In the fall of 2011, he announced his resignation.
Document 8: Oscar Robertson: Oscar Palmer Robertson (born November 24, 1938), nicknamed "The Big O", is an American former National Basketball Association player who played for the Cincinnati Royals and Milwaukee Bucks. The 6 ft , 205 lb Robertson played point guard and was a 12-time All-Star, 11-time member of the All-NBA Team, and one-time winner of the MVP award in 14 professional seasons. In 1962, he became the first of only two players in NBA history to average a triple-double for a season. In the 1970–71 NBA season, he was a key player on the team that brought the Bucks their only NBA title. His playing career, especially during high school and college, was plagued by racism.
Document 9: Kareem Abdul-Jabbar: Kareem Abdul-Jabbar (born Ferdinand Lewis Alcindor Jr.; April 16, 1947) is an American retired professional basketball player who played 20 seasons in the National Basketball Association (NBA) for the Milwaukee Bucks and the Los Angeles Lakers. During his career as a center, Abdul-Jabbar was a record six-time NBA Most Valuable Player (MVP), a record 19-time NBA All-Star, a 15-time All-NBA selection, and an 11-time NBA All-Defensive Team member. A member of six NBA championship teams as a player and two as an assistant coach, Abdul-Jabbar twice was voted NBA Finals MVP. In 1996, he was honored as one of the 50 Greatest Players in NBA History. NBA coach Pat Riley and players Isiah Thomas and Julius Erving have called him the greatest basketball player of all time.
Document 10: Pete Babcock: Pete Babcock is a retired NBA executive, serving as general manager with three franchises; the San Diego Clippers, Denver Nuggets and Atlanta Hawks. He also worked in a variety of capacities from scouting to coaching to player personnel with the New Orleans Jazz, Los Angeles Lakers, Milwaukee Bucks, Toronto Raptors and Cleveland Cavaliers over a 42-year period. He also served as president and minority owner in his final two seasons with the Denver Nuggets. His Nuggets and Hawks teams appeared in the playoffs 14 out of 15 seasons. Babcock also directed the NBA Pre Draft Camp for over twenty years, served on the competition and rules committee and steering committee for the NBA and was a member of the USA basketball men's selection committee picking the 1996 Olympic team and head coach.
Document 11: National Basketball Retired Players Association: The National Basketball Retired Players Association (NBRPA) is a non-profit association composed of former professional basketball players of the NBA, ABA, Harlem Globetrotters, and WNBA. It was founded in 1992 by NBA Hall of Famers Dave DeBusschere, Dave Bing, Dave Cowens, Oscar Robertson and former NBA point guard Archie Clark. Also referred to as the Legends of Basketball, the NBRPA serves as the official alumni organization for the NBA, ABA, Harlem Globetrotters, and WNBA.
Document 12: 1960–61 Cincinnati Royals season: The 1960–61 season was the Royals 13th season in the NBA and its fourth in Cincinnati. The season was defined by the debut of Oscar Robertson. He would win the Rookie of the Year by nearly averaging a triple double for the entire season. The Big O averaged 30.5 points per game, 10.1 rebounds per game and 9.7 assists per game. He was also MVP of the 1961 NBA All-Star Game.
Document 13: Rick Barry: Richard Francis Dennis Barry III (born March 28, 1944) is an American retired professional basketball player who played in both the American Basketball Association (ABA) and National Basketball Association (NBA). Named one of the 50 Greatest Players in history by the NBA in 1996, Barry is the only player to lead the National Collegiate Athletic Association (NCAA), ABA and NBA in scoring for an individual season. He was known for his unorthodox but effective underhand free throw shooting technique, and at the time of his retirement in 1980, his .900 free throw percentage ranked first in NBA history. In 1987, Barry was inducted into the Naismith Memorial Basketball Hall of Fame. He is the father of former NBA players Brent Barry and Jon Barry and current professional player Canyon Barry.
Document 14: Russ Granik: Russ Granik is an American sports executive who served as Deputy Commissioner of the NBA for 22 years. He retired from that position on July 1, 2006, after 30 years with the NBA. Granik was inducted into the Naismith Memorial Basketball Hall of Fame on September 8, 2013, alongside basketball legends including Gary Payton, Bernard King, Rick Pitino, and Jerry Tarkanian. He was enshrined into the Hall of Fame by Jerry Colangelo. During his professional career, Granik served as the announcer of second-round picks in the NBA Draft and in later years, the television host of the NBA Draft Lottery.
Document 15: Larry Bird: Larry Joe Bird (born December 7, 1956) is an American professional basketball executive, former coach and former player, most recently serving as president of the Indiana Pacers in the National Basketball Association (NBA). Since retiring as a player for the Boston Celtics, he was a mainstay in the Indiana Pacers organization, but stepped down from the position of president following the first-round of the 2017 Eastern Conference playoffs.
ground_truth: Oscar Robertson