Mathurin is entering a contract year, and players like him are no longer valuable, a guy who can score the ball without providing much else isn’t valuable, so they trade him for an elite shot blocking and rebounding center. He has limitations on offense, but Tyrese’s overrall IQ and playmaking will make him a better player offensively. Brice is an elite shooter who can replace mathurins scoring. Draft someone (in 26 draft) who can replace Siakam long term, and this team is set for the next 7-10 years.