The Houston Rockets progressed to the next round of the NBA playoffs by beating the Oklahoma City Thunder on Tuesday night.
Late in the third quarter of the game, referee Marc Davis stood on the sideline wiping the ball clean before handing it to a Thunder player.
'You need to go back to referee school,' quipped a fan sitting nearby.
Davis, in his 20th season as an NBA ref, turned with a knowing glance.
I actually have my doctorate in refereeing.
The Nigel Owens of the NBA official world.