Rick Welts· Sports · 12 sources · 2dStoryMavericks name Casson CEO as Welts retires at year endDallas Mavericks CEO Rick Welts will retire Dec. 31, with team president Ethan Casson succeeding him as CEO and alternate governor on Jan. 1. Welts, a Basketball Hall of Famer who helped advance the team’s leadership and arena plans, has worked alongside Casson to ensure a smooth transition.Sports· 2d+9+31ShareDerek Foss·2dTop commentWelts built a strong foundation for the Mavericks, and Casson looks like the right pick to keep things steady after the handover.ReplyGenius replyShareWrite a comment…