Moondog

I am ashamed that I didn't know how Moondog got his name until now. Via Wikipedia:

 

 Moondog is the official mascot of the Cavaliers. Like a growing number of NBA Mascots, the character has a unique connection not just to the team, but to the city and surrounding area. Cleveland is known worldwide as the rock and roll city, due to famed Cleveland radio disc jockey Alan Freed, who popularized the phrase "rock and roll", breaking new ground and sparking a music explosion. Freed called himself the "Moondog", and his listeners were "Moondoggers". When the Cavaliers looked to create a new mascot which represents the city, Moondog was a natural selection.