By Ryan AberSTILLWATER — At the beginning of the season, Oklahoma State baseball coach Josh Holliday wasn’t sure how he planned to use Conor Costello. “We thought he may be one of our weekend starting pitchers, but we also thought he might be our four-hole hitter, too,” Holliday said. Now, there’s no doubt what Costello is. The sophomore from Edmond Santa Fe isn’t hitting fourth for the Cowboys, but he’s been a critical piece in OSU’s offensive success near the end of the season. In last week’s regional, Costello was 6 for 12 with six RBIs and two home runs.Read more on NewsOK.com