Root root root for the home teams — Oklahoma State University and University of Oklahoma, that is — as the Big 12 Baseball Championship swings away at the Chickasaw Bricktown Ballpark for a 15-game series. It begins at 9 a.m. today, with the final game at 1 p.m. Sunday, so place your bets! (Er, don’t — that’s illegal, actually.) Weekend passes are $67-$117; allsession passes, $87-$202. Visit big12sports.com.