How is the nba draft right determined?

The evolution of NBA rookie selection system: 1947-65: district draft at the beginning of the league, it was difficult for the team to attract fans to watch the game, so the team could draft from the location of the team. Before the draft begins, the team can give up the first draft pick and choose a player with high support rate from the team's location, so as to improve the team's reputation. In 1965, the Boston Celtics selected Han Sen from the Holy Cross with the regional draft pick. In his nine-year career, Hansen averaged 18.6 points and 8.8 rebounds, helping the Celtics win the championship eight times. 1966-84: The coin flip draft league began to use coin flip on 1966 to determine the ownership of the top pick. Only the two teams with the worst record in the East and West regions are eligible to compete for the top spot. This system was not replaced by the current lottery system until 1985. The remaining teams decide the draft order according to the number of winners and losers. The worse the team's record, the higher the draft order. 1979, the Chicago Bulls lost 3 1 to 5 1, and lost to the New Orleans Jazz with a record of 26 wins and 56 losses in the first draft. But at that time, the Jazz traded three draft picks for the Lakers' free man goodrich, including the first round draft pick. 1979 The No.1 pick was none other than Magic Johnson from Michigan. The following season, led by the rookie guard, the Lakers won the second championship after the team moved to Los Angeles. At that time, jazz in New Orleans was jazz in Utah. 1985: the first lottery NBA implemented a new lottery draft system before the start of the 1985 draft to determine the first draft order of the teams that failed to enter the playoffs (or the teams that won the first draft through transactions). After the first round of draft, the draft will be conducted according to the record of each team, and the team with poor record is still ranked in the top. When the lottery system was implemented, the top pick was Patrick Ewing, a 7-foot center from Georgetown. For the seven teams that failed to enter the playoffs, their chances of winning the No.1 Ewing are equal. But the new york Knicks won the favor of the goddess of luck and won the general. Dave debusschere, then the general manager of Knicks and a Hall of Fame player, jumped out of his chair with joy when the table tennis used for the lottery stopped beating. Since 1985, Ewing played 15 seasons with the Knicks and led the team 13 times to the playoffs. 1987 till now: three priority teams 1986 10. 10, NBA management revised the previous lottery system. According to the new system, the league will draw lots to select three teams from the teams that have never made it to the playoffs. These three teams will get the first choice. The remaining teams that failed to enter the playoffs are still ranked according to their team's record in the first draft. This ensures that the three teams at the bottom of the league can choose the fourth rookie in the worst case, while the team with the second worst record can get at least the fifth rookie. 1987, the record of the Los Angeles Clippers was 12 and 70 losses. But they had bad luck in the lottery. According to the new regulations. Won the No.4 rookie. At that time, the Spurs' record in the regular season was 28-54, ranking fourth from the bottom in the league, but they were lucky to choose david robinson, a center from the Navy. That year, only one of the three teams with the worst record chose the top three: New Jersey chose defender Dennis Hopson from Ohio. 1988, only one of the bottom three teams got the chance to choose the top three. The Clippers with the lowest winning percentage finally won the top pick of the year. He is forward danny manning from Kansas. 1989 Up to now: There are only two draft rounds. In the early draft, the team will choose until there are no available talents. In the draft of 1960, there are 2 1 rounds. By 1974, the draft was stable at 10 round. To 1985 reduced to 7 rounds. 1989, in order to give players who were not selected a chance to try out with the team, the National Basketball Players Association limited the draft to only two rounds. Since the implementation of the two-round draft system, eight second-round rookies have participated in the All-Star Game: Jazz guard Jeff Hornacek (1992), Pistons forward dennis rodman, Lakers guard cedric ceballos (1995) and Raptors center antonio davis (20065438). Wizards guard gilbert arenas (2005), Spurs guard Manu Ginóbili (2005), Sonics forward Rashard Lewis (2005). In 2003, Detroit Pistons center ben wallace and Indiana Pacers center brad miller were the only players who were not selected but eventually became all-stars. 1990 up to now: favorable lottery system 1989 10 The league management has further improved the lottery system in the draft. In the draft of 1990, due to the development of the league, * * * has 1 1 teams to participate in the lottery. According to the new rules, the team with the worst record in the regular season has a 65,438+065,438+0 (65,438+065,438+0/66) chance to win the first prize, and the team with the second worst record has a 65,438+00 (65,438+00/66) chance. The team that participated in the lottery but failed to participate in the playoffs but had the best record had a 1( 1/66) chance to win the first prize. Orlando Magic was lucky to win the No.1 pick for two years in a row. 1992, Magic's league record was the second from the bottom, 2 1 6 1 negative. They chose this year's No.1 pick, center O 'Neal of Louisiana State University. O 'Neal helped the Magic win 20 more games, but he still missed the playoffs of 1993. In the second year's draft, Magic chose power forward chris webber from the University of Michigan, although the probability of choosing the No.1 pick was only 1/66. After that, the Magic immediately traded Webber to the Golden State Warriors in exchange for three draft picks and the flower show of that year, Wu Yufang Hardaway, a defender from Memphis. 1994, the league management revised the draft rules again, increasing the chances of the weakest team getting the top three rookies and reducing the chances of the team with good record. This change will increase the probability that the team with the worst record will win the first prize from the original 16.7% to 25%, and reduce the probability that the team with the best record will win the first prize from the original 1.5% to 0.5%. Under this rule, put 14 table tennis balls with numbers (1 to 14) into a bucket. Four balls will be drawn from the 14 ball when drawing lots. Regardless of the arrangement order, these four numbers are always composed of 100 1. Before the draw, the organizer will allocate the combination of 1000 to the teams participating in the draw according to the regular season record. After that, four ping-pong balls will be drawn to form a combination. The team with this combination has the first pick. Then put the ball back in the bucket and repeat the whole process to decide the No.2 draft pick and No.3 draft pick. 1996-2003: 13 teams participated in the lottery. 1995, the NBA added two new teams, Toronto Raptors and Vancouver Grizzlies (now Memphis Grizzlies), and the number of teams participating in the lottery increased from 1 1 to 13. From 1996, the probability that the team with the worst record will win the first draft is still 25%(250 combinations); From the penultimate place (20%, 200 combinations) to the penultimate place (6.4%, 64 combinations), the probability of winning the grand prize is slightly smaller than before; The probability that the seventh team from the bottom (4.4%, 44 combinations) wins the first draft is the same as before; The probability from the eighth from the bottom (2.9%, 29 combinations) to the last 12(0.6%, 6 combinations) is slightly improved. The 13th from the bottom (0.5%, 5 combinations) also has the possibility to win the top pick. Teams with the same record share the probability equally. If the sum of probabilities is a product, the two teams draw lots to decide who gets the extra percentage. From 2004 to present: 14 teams participated in the lottery. Because of Charlotte Bobcats, there were 14 teams participating in the draft draw in 2004. But in 2004, Bobcats' draft pick was fixed at the fourth place, so there was no chance to get other rookies in the lottery.