The Sooners battled back from 25 points down in the second half to draw within one but couldn't come back over the top, falling 70-67 to TCU in the regular season finale Saturday afternoon.
Much like their arch-rival Texas Longhorns did so to them just a week and a half ago in storming back from a 22-point deficit to win, the Sooners used the press to get back into it by really speeding up the tempo of the game.
That stimulated a 34-17 close over the final 13:30, but it wasn't quite enough when point guard Sam Grooms' wide open three in the corner clanked short at the buzzer.
The final miss from behind the arc was part of a horrid 0-for-16 performance for the Sooners from long range.
For TCU in a wire-to-wire performance completely opposite from the teams' first meeting, forward Garlon Green led the way with his 18.
Guard Charles Hill, Jr. and forward Connell Crossland finished with 13, while guard Kyan Anderson poured in another 11.
TCU outshot OU 54 percent to 36.4 percent, but a 19-for-27 performance at the line and 22 second chance points to just nine for the Horned Frogs kept the Sooners in it.
Despite the setback, OU locked up the four seed in the Big 12 Conference Tournament and will face Iowa State for the third time this season when the two lock hands at 11:30 a.m. CT Thursday inside Kansas City, Mo.'s Sprint Center..