Only SIX test batsmen with a career batting average of over 60, Don Bradman's average was 99.94.
Next best is 64 (and Steve Smith is still an active player so this will probably come down).
1. Avery Bradley, the Celtics' #1 defender (at the time), did not play. He would have been guarding Devin Booker.
2. The Celtics were winning by around 30 points throughout the entire game, so they did not concern themselves with how many points Devin Booker was scoring.
3. At the end of the game, the Suns repeatedly intentionally fouled the Celtics, just so they could get the ball back and add to Booker's point total.
Remember that I am a Celtics fan, and my "saltiness" is meant to be perceived with a layer of humor.