Dallas Baptist relief pitcher Chris Haney struck out TCU's Josh Elander with the tying run at third base in the ninth inning to give the Patriots a 3-2 win over the Horned Frogs.
TCU (43-18) plays Oral Roberts at 2 p.m. Sunday in an elimination game at Lupton Stadium. The winner meets DBU (41-17) at 7 p.m. Sunday in the Fort Worth Regional championship.
Matt Purke allowed two runs in five innings Saturday and left with the game tied at 2-2. The Patriots scored in the sixth to take a 3-2 lead against Frogs' reliever Trent Appleby (4-3) who took the loss.
DBU scored a run in the first when Ryan Behmanesh scored from second on a two-base wild pitch from Purke. Jason Krizan's nation-leading 39th double in the third scored another run to put the Patriots up 2-0.