It's always been considered unlikely that the Boston Celtics and Jaylen Brown would reach a deal on a contract extension, the franchise just doesn't do that (the last one was Rajon Rondo). The Celtics made a four-year, million offer to Brown but he turned it down, reports Chris Haynes of Yahoo Sports. Next season the Celtics will have another major decision: figuring out if Jayson Tatum is worth the rookie-scale max.