Pop Isaacs scored 19 points and put 23rd-ranked Texas Tech ahead to stay with a three-point play with 39 seconds remaining as the Red Raiders rallied from a double-digit deficit and beat TCU 82-81 on Tuesday night. Texas Tech (19-7, 8-5 Big 12) trailed 69-59 with 6:55 left. Isaacs scored nine of his points after that, including two free throws with 12 seconds left.