OKLAHOMA CITY – A deep, deep exhale from OU softball pitcher Kelly Maxwell. Finally. Settling in for the postgame press conference, Maxwell was just minutes removed from a career-defining performance, still taking it all in. A moment she had been waiting for throughout her softball days. And a moment she was hoping to actually experience when she transferred to OU. It was a throwback game between No. 2 OU and No. 6 UCLA. The days of high-powered offense littered in today’s game were no match for the pitching masterpieces put on display. But nobody – on this day – nobody could match Maxwell. Do…