Approximately 50 players participated in at least one conference call with an antitrust attorney this week, according to a report from Adrian Wojnarowski of Yahoo! Sports.

Sources tell ESPN's Marc Stein that the most vocal "star" player was Paul Pierce.

Grant Hill, Russell Westbrook, Dwyane Wade, Ray Allen, Dwight Howard, James Posey and J.J. Redick participated as well.

Adrian Wojnarowski reports Jason Kidd, Blake Griffin, Tyson Chandler, Al Horford, Spencer Hawes and DeAndre Jordan also participated in the call.