Shannon's 21 help No. 15 Texas Tech hold off Oklahoma 69-67

Oklahoma's Austin Reaves, left, and Texas Tech's Micah Peavy (5) scramble for the ball during the second half of an NCAA college basketball game in Norman, Okla., Tuesday, Dec. 22, 2020. (AP Photo/Garett Fisbeck)

Texas Tech's Marcus Santos-Silva (14) is defended by Oklahoma's Brady Manek (35) during the first half of an NCAA college basketball game in Norman, Okla., Tuesday, Dec. 22, 2020. (AP Photo/Garett Fisbeck)

CORRECTS SPELLING TO REAVES, INSTEAD OF REEVES - Oklahoma's Austin Reaves (12) watches as Kur Kuath (52) moves between Texas Tech's Mac McClung (0) and Terrence Shannon Jr. (1) during the first half of an NCAA college basketball game in Norman, Okla., Tuesday, Dec. 22, 2020. (AP Photo/Garett Fisbeck)

Oklahoma's Brady Malek (35) is guarded by Texas Tech's Jamarius Burton and Marcus Santos-Silva during the second half of an NCAA college basketball game in Norman, Okla., Tuesday, Dec. 22, 2020. (AP Photo/Garett Fisbeck)

Texas Tech's Jamarius Burton (2) is defended by Oklahoma's De'Vion Harmon during the first half of an NCAA college basketball game in Norman, Okla., Tuesday, Dec. 22, 2020. (AP Photo/Garett Fisbeck)