KC Jones was part of the Celtics dynasty - he arrived from San Francisco with Bill Russell - and had a reputation as being a bit quiet and perhaps eccentric.
Russell said it took weeks for him to speak to him when they were college roommates - Jones would just slap the bunk to wake him up and then leave for class. Then once he started talking he never stopped.
He was a great defender as you’ll see in this clip. Some things don’t translate across decades but the guy was an absolute pit bull (he must love Tre Jones by the way).