Tiger Woods spends Sunday hanging out at Raiders' Black Hole

Tiger Woods wasn't among the golfers at the season-opening Frys.com Open this weekend as he continues to rehab the injured back that cut his 2013-2014 season short. But rehab shouldn't always be hard work.

Sometimes, even Tiger needs to kick back and relax with his buds:

On Sunday, Tiger took in the San Diego Chargers vs. Oakland Raiders game and spent some time with "The Black Hole." 

He even hung out with Raiders great Tim Brown:

Tiger is a huge Raiders fan and was back in town as good friend Notah Begay III was being inducted into the Stanford University Hall of Fame.

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