A Bedlam softball battle between Oklahoma and Oklahoma State on Saturday was dominated by defense for most of the early going. But the Cowgirls bats got hots in the sixth inning, leading to an eventual 6-2 victory in Norman to claim their first series win in the rivalry since 1993. Entering the top of the sixth trailing 2-1, OSU reeled off five runs on the back of three homers to take the lead for good. That included a three-run blast from Jilyen Poulard that increased the Cowgirls’ lead from one to four to give them some cushion entering the final two frames. The Sooners went three up, three …