Lamar Odom underwent an MRI exam and a CT scan today, which revealed that the Lakers power forward has a bruised back. His status for Game 5 on Tuesday at Staples Center was termed questionable by a team spokesman. Odom was injured when he fell on his back midway through the third quarter of Game 4 on Sunday afternoon. It’s possible Lakers coach Phil Jackson could start Luke Walton instead of Andrew Bynum if Odom isn’t sound enough to play in Game 5.