Los Angeles Lakers star LeBron James is doubtful for Sunday’s home game against the Nuggets with a thoracic muscle strain, coach Frank Vogel announced Saturday. LeBron James first sustained the injury, a pull in the rib cage area, against the Indiana Pacers on Tuesday and played through it during Thursday’s loss to the Milwaukee Bucks. James didn’t require an MRI, but this is a significant issue and not just a load management situation, sources told ESPN.