Earlier this week, the Celtics received permission from the Clippers to speak with Jay Larranaga, who spent nine years in Boston as an assistant coach. However, Larranaga chose to stay in Los Angeles. View the original article to see embedded media. According to Marc Stein, via his substack, The Stein Line, the Celtics are expressing interest in two accomplished former NBA head coaches to add to Joe Mazzulla’s staff. “The Celts are … interested in two of the top available former head coaches — Frank Vogel and Terry Stotts — but pessimistic about their chances of luring either to usher…