A trade is in the works that will send Golden State Warriors 7-foot center Willie Cauley-Stein to the Dallas Mavericks, ESPN reported Friday. Citing league sources, ESPN reported the Warriors will receive a 2020 second-round draft pick in the deal. The Mavericks are in need of a backup big man after losing Dwight Powell, who ruptured his right Achilles tendon during Tuesday night's 110-107 home loss to the Los Angeles Clippers.