Wednesday, December 23, 2009 - 1:15 pm (PT) Los Angeles Clippers rookie forward Blake Griffin underwent a CT Scan and MRI of the stress fracture of his left patella yesterday. In addition to his continued strength and conditioning work, Griffin has been cleared to begin running on an AlterG Anti-Gravity treadmill beginning today and is expected to begin running on a normal full-body weight treadmill next week. Based on expected progression, Griffin is expected to be cleared for a return to basketball related activity in approximately three weeks. Griffin, the first overall selection in the 2009 NBA Draft, suffered a non-displaced stress fracture of his left patella during the Clippers’ last preseason game vs. the New Orleans Hornets on Friday, October 23rd.