TCU has an RPI of 27; their non-con RPI is 9.
OU has an RPI of 21, and wins over Kansas, Texas Tech, Wichita State and TCU.
The committee isn't looking at the last 10 games of the year as closely as they have in the past, but those two teams are solidly in the tournament. Texas is the outlier, and is the one that Nebraska needs to catch, IMO.