2013 - Nearly beat a good TCU team after losing 41-7 to a mediocre Kansas State team. Beat Kanas 34-0 after a 38 point loss to Oklahoma. No, it wasn't an upset. But no one predicted the 1-9 Cyclones to not only beat, but shutout Kansas and beat them by 34.
TCU went 4-8 last year
2012 - Close loss to #6 Kansas State, followed by a 21 point loss to a non-ranked Okie State team, followed by a 14 point win over a good Baylor team. Baylor finished strong in 2012, but was 0-4 in conference when we played them.
2011 - Loss to A&M by 14 but if I recall correctly it should've been by much more after the first half. Followed it up with a 34 point win over #19 Texas Tech. Texas Tech won 2 conference games in 2011.
2010 - #6 OU beats us 52-0, we beat #22 Texas @ Texas by 6 the following week. Texas won 2 conference games in 2010.