Mavericks sign rookie Dereck Lively II

The Dallas Mavericks yesterday signed 12th overall pick Dereck Lively II. Lively was acquired from Oklahoma City in exchange for the draft rights to 10th overall pick Cason Wallace and forward Dāvis Bertāns. Lively (7-1, 234) was an early-entry candidate to this year's draft after spending one season at Duke. In his lone season with …