Big 12 notebook: Missouri fired up to play OU

Kansas may be Missouri’s biggest rival and final regular-season game. But based on recent history, the Missouri players say they have circled Oct. 23, when OU comes to Columbia. “It’s a big game. It’s our Homecoming game,” said cornerback Kevin Rutland. “Since I’ve been here, we’ve never beaten them. So it’s a big game for me, and our entire team. Losing to them in both championship games, it …