Harrison Barnes scored a career-high 34 points and the Dallas Mavericks won for the first time this season, beating the Milwaukee Bucks 86-75 in overtime Sunday night. Barnes, who left Golden State to sign a $94 million, four-year contract with Dallas in the offseason, has scored at least 30 points twice this season after hitting the mark only once in his four years with the Warriors. J.J. Barea added 21 points for Dallas, including five in overtime.