In a game that "felt like it was an NCAA tournament game" the Horned Frogs fell short in the final seconds.
Moore and Okonkwo are looking to lead TCU to the NCAA tournament for the first time in their careers.
The Horned Frogs collected 21 hits and scored their highest run total since 2012.
The head coach also provided an update on former wide receiver KaVontae Turpin.
The team's seniors combined for 48 points.
TCU's starting five scored all 66 of their points, while the bench went 0-4.
Senior Moore tied her career-high with 28 points in the victory.
The Horned Frogs were left with just five rotation players in the third overtime.
The senior scored 27 points and grabbed 11 rebounds.
The Horned Frogs put up their highest run total since 2017 behind five home runs.