The AP reports: The Celtics’ 39-point margin in Tuesday night’s championship clinching win is the largest in a decisive NBA finals game. In fact, Boston now has four of the six biggest margins in games that clinched titles…  Ray Allen set a record for most 3-pointers made in a finals series with 22. The previous mark of 17 was set by Dan Majerle with Phoenix in 1993 and matched by Derek Harper with New York in 1994. Allen’s seven 3-pointers Tuesday night tied the finals record shared by Houston’s Kenny Smith and Chicago’s Scottie Pippen. And Boston’s 52 baskets from 3-point range erased the finals mark of 51 set by San Antonio in 2005… The Celtics also put on a record-setting defensive performance Tuesday with 18 steals, eclipsing the single-game finals mark set by Golden State against Washington in 1975.