Lakers forward Kyle Kuzma, who is averaging 18.3 points per game, was diagnosed with a lower back contusion and is questionable for Friday's game against the Knicks.
Andre Ethier, who missed last year's opener and much of the season due to a leg fracture, could be out again on Opening Day due to a herniated disk.
Royals lefty Brian Flynn is out eight weeks after sustaining injuries from falling through the roof of a barn.
On his website, Tiger Woods said he will miss next week's Genesis Open and The Honda Classic, which is set to start Feb. 23. He will determine his next event after his back is reassessed.
Mike Krzyzewski will coach Wednesday against Georgia Tech and then step away for surgery on a herniated disk, which has an anticipated recovery time of four weeks.
Patriots tight end Rob Gronkowski is finished for the season, as he'll be placed on injured reserve after having back surgery.
