The 26-year-old superstar is set to form a potent strikeforce alongside LeBron James after joining the Lakers following a blockbuster trade deal with the New Orleans Pelicans last month.
The apparel and shoemaker would be stuck with tens of millions of dollars in James 23 jerseys.
Eight-time All-Star Westbrook, the 2017 NBA Most Valuable Player, will be reunited with 2018 NBA MVP James Harden.
Milwaukee Bucks' Giannis will be joined by 26-year-old Thanasis who plays for Greek side Panathinaikos, and 21-year-old Dallas Mavericks' power forward Kostas.
Boston Celtics playmaker Kyrie Irving would be joining Durant in Brooklyn on a four-year deal worth $141 million.
James has worn number 23 during both stints with the Cleveland Cavaliers and with the Lakers last season after he departed his hometown club a year ago in free agency.
The 24-year-old from Greece beat out 2018 MVP James Harden of the Houston Rockets and Oklahoma City Thunder forward Paul George for the honor.
Kawhi Leonard was named the NBA Finals Most Valuable Player for the second time in his career.
Defending champions Golden State entertain Toronto in game six Thursday needing a victory to pull level at 3-3 and force a game seven Sunday at Toronto.
Curry scored 31 points while Thompson added 26 as the Warriors pulled within 3-2 in the best-of-seven championship series.
Two road victories gave the Raptors a 3-1 edge in the best-of-seven series against the defending champion Golden State Warriors and they can become the first NBA champions from outside the United States with a triumph Monday.
The Raptors own a 3-1 lead in the best-of-seven NBA Finals entering Monday's game five at Toronto and could become the first team from outside the United States to capture the championship.
Kawhi Leonard was the star for Raptors, scoring 36 points.
Mark Stevens was banned from NBA games and all Warriors activities for one year and fined $500,000 by the league and the team on Thursday.
The Warriors seek a third consecutive NBA crown and their fourth in five seasons while the Raptors are in the finals for the first time in their 24-season history.