There is no grave concern bubbling (yet) in Dallas about the Knicks’ hiring of Jalen Brunson’s father Rick to join Tom Thibodeau’s coaching staff. It has been known throughout the league that Thibodeau has wanted Rick Brunson on his staff from the moment he joined the Knicks entering the 2020-21 season and not because it will help New York lure Rick’s son Jalen Brunson away from the Mavericks in free agency this summer.