Devin Booker scored 28 points, Deandre Ayton added 20 and the Phoenix Suns beat the Dallas Mavericks 110-80 on Tuesday night to take a 3-2 lead in the Western Conference semifinals. The Suns used a huge third quarter to turn a tight game into a comfortable win. Phoenix opened up the second half on an 11-4 run, highlighted by Booker’s two 3-pointers, for a 61-50 lead.