Isaiah RobyPosition: ForwardAge: 21Size: 6-8, 230Experience: RookieContract: Mavericks signed the 2019 second-round pick (No. 45 overall) to a historic four-year, $6.7 million contract.2018-19 recap: Roby made history as a draftee â” the first NBA selection out of Nebraska in 20 years and the first ever from his small Dixon, Ill., hometown.