Sooners baseball heads into the final two weekends of the Big 12 regular season with a three-game lead in the conference standings after holding on for an 8-7 win on Sunday, sweeping Texas Tech for the first time since 2011. It was Oklahoma’s school-record fifth conference sweep of the season. A week after being terrorized by the two-run home run on getaway day, it was the friend for head coach Skip Johnson and company. OU homered three times on Sunday. Michael Snyder and John Spikerman each homered in the second and third inning to build Oklahoma a 4-1 lead through four. Texas Tech rallied fo…