The reigning national champion Sooners are two strokes back of Iowa State at the midway point of the championship, being played at Southern Hills Country Club in Tulsa, Oklahoma.
Ranked fourth in the country, Oklahoma was in fifth place after 18 holes with a score of plus-14, 294, but moved up four spots after a three-under-par score of 277 in the second round, passing five-time defending conference champion Texas, Baylor and Oklahoma State in the process.
Oklahoma State is three strokes back of Oklahoma after 36 holes, and Texas is fourth, six shots back of the Sooners and eight off the lead, heading into the final two rounds.