NORMAN — Clutching the Rally Baby in his right hand, Austin O'Brien knew it was coming.
He wasn't about to try to avoid it.
O'Brien delivered in a big way in his final regular-season game at L. Dale Mitchell Park — and the senior from Owasso was going to enjoy every bit of it — even the ice-cold water and Gatorade that he was about to get showered with.
O'Brien's final contribution was a walk-off single to left-center to score Kyler Murray and give the Sooners a 10-9 win over TCU that gave Oklahoma the series win.