Chris Keck and Brett Stephens each drove in two runs and UCLA clinched at least a share of the Pac-12 Conference baseball championship with a 5-3 victory over Arizona on Sunday. The second-ranked Bruins (40-12 overall, 21-6 in conference play) have won or shared the title three of the last five seasons. UCLA wiped out a 2-0 deficit with a four-run fifth inning. Stephens’ two-run single tied the score before Keck singled to center for a 4-2 lead. Cody Poteet pitched 1 2/3 innings in relief for the victory. He has a 5-1 record on the season. David Berg went 1 2/3 innings for his 12th save. UCLA also won the Pac-12 title in 2011 and 2012.