After visiting with OU's medical staff early this afternoon, Capel said that Griffin, who leads the Big 12 in scoring and leads the nation in rebounding, is still recovering from a concussion sustained in Saturday's game at Texas. Griffin's return to action is not known.
Griffin is averaging 22.0 points and 13.8 rebounds while shooting a Big 12-best .632 from the field. He also leads the country with 22 double-doubles.
The 6-10, 251-pounder from Oklahoma City played just 11 minutes Saturday at Texas.
Tonight's matchup in Norman will give the winner sole possession of first place in the Big 12 race with three games remaining in the regular season. OU is 25-2 overall, 11-1 in conference play and is ranked No. 3 in both major polls. Kansas is 22-5, 11-1 and ranked 15th in both polls.
Tip-off is set for 8 p.m. CST.