Yahoo! Sports Marc J. Spears is reporting that the Grizzlies trade for Miami HEAT center Dexter Pittman has been agreed to. HOOPSWORLD sources confirm it, as well. The Grizzlies will be giving up a second-round pick.
Heat has agreed to send forward-center Dexter Pittman and a second round pick to the Grizzlies for a trade exception, sources tell Y! Sports
— Marc J. Spears (@SpearsNBAYahoo) February 21, 2013 
Source: Yannis Koutroupis, Hoopsworld