Sandwiched between an emotionally charged victory against archrival Kansas and a top 10 showdown with first place on the line, Missouri faced a test of its collective focus. The Tigers got a passing grade -- barely. Marcus Denmon scored 25 points, Ricardo Ratliffe added 15 points and 10 rebounds and No. 4 Mizzou claimed first place in the Big 12 by edging Oklahoma 71-68 on Monday night.