Boston Celtics coach Doc Rivers yells to an official during the second half of an NBA basketball game against the Washington Wizards in Boston, Wednesday, Nov. 7, 2012. The Celtics won 100-94 in overtime. (AP Photo/Elise Amendola)

Photo by: Elise Amendola

Boston Celtics coach Doc Rivers yells to an official during the second half of an NBA basketball game against the Washington Wizards in Boston, Wednesday, Nov. 7, 2012. The Celtics won 100-94 in overtime. (AP Photo/Elise Amendola)