Article Photos: Oklahoma City Thunder notebook: NBA investigates confrontation between Kendrick Perkins, Zach Randolph 23/30

Oklahoma City's Russell Westbrook (0) and Nick Collison (4) go after a rebound against Memphis' Marreese Speights (5) during the NBA basketball game between the Oklahoma City Thunder and the Memphis Grizzlies at Chesapeake Energy Arena on Wednesday, Nov. 14, 2012, in Oklahoma City, Okla.   Photo by Chris Landsberger, The Oklahoman