Each of the Power 5 conferences enter Week 5 of the college football season with three or more unbeaten teams. There will be at least one less in the Big 12 after Saturday, when No. 24 Kansas travels to No. 3 Texas.
That's not to say the rest of the teams without a defeat will get out of the weekend unscathed. No. 8 USC is on the road at once-beaten Colorado, No. 17 Duke plays host to No. 11 Notre Dame and unranked but unbeaten Syracuse gets a test at home against Clemson.