Washington Wizards guard John Wall, center, pleads with an official as he sits with guard Shelvin Mack, left, and assistant coach Sam Cassell, right, on the bench during the third quarter of an NBA preseason basketball game against the New York Knicks in Washington, Thursday, Oct. 11, 2012. The Knicks defeated the Wizards 108-101. (AP Photo/Ann Heisenfelt)
Washington Wizards guard John Wall, center, pleads with an official as he sits with guard Shelvin Mack, left, and assistant coach Sam Cassell, right, on the bench during the third quarter of an NBA preseason basketball game against the New York Knicks in Washington, Thursday, Oct. 11, 2012. The Knicks defeated the Wizards 108-101. (AP Photo/Ann Heisenfelt)
In this April 3, 2011 photo Washington Wizard's assistant coach Sam Cassell, back, helps guard John Wall, front, during warm ups before an NBA basketball game in Charlotte, N.C. Cassell is one of 18 former All-Stars now serving as assistant coaches in the NBA. They provide valuable insight while bringing the added benefit of being able to banging with the players in practice. (AP Photo/Chuck Burton)
Kentucky's John Wall, right, talks with Washington Wizards basketball coach Flip Saunders, second from right, and Wizards team president Ernie Grunfeld, left, during a pre-NBA draft basketball workout for the Washington Wizards, Thursday, June 17, 2010, in Washington. Behind Grunfeld at left is Washington Wizards assistant coach Sam Cassell.
