WACO, Texas (AP) — While Baker Mayfield never really sensed that Oklahoma's series against Baylor was becoming a rivalry, the quarterback knew it had become quite a challenge. Mayfield has since helped third-ranked Sooners restore their dominance against the Bears — and in the Big 12. Two-time defending Big 12 champion Oklahoma (3-0), which has won 16 straight league games, plays Saturday night at Baylor (0-3) in the conference opener for both teams. "I wouldn't say it's more exciting because we had a good game two years ago," Mayfield said.Read more on NewsOK.com