Cause for concern (?)

Are you worried about the Celtics?

After losing to the Wizards on Sunday afternoon, the Celtics’ record has dropped to 13-13. (And they didn’t just lose, by the way. They got blown out. The 13-point final margin of defeat is not reflective of the tenor of the game.) Boston has now lost four of its last five, seven of its last 10, and 10 of its last 15. The team is minus-1.7 per game over…