Update, July 21: Kostas Antetokounmpo's time on the waiver wire didn't last long. The Los Angeles Lakers claimed the forward off free agent waivers on Sunday, according to The Athletic's Shams Charania. The Mavericks had placed him on waivers Friday afternoon.Original story, July 19: The Mavericks announced on Friday they requested waivers to release forward Kostas Antetokounmpo.Antetokounmpo, a younger brother of reigning NBA MVP Giannis, signed with the Mavericks on a two-way contract last offseason.