Feb. 27—After a fast start to the season and a dissapointing stretch from late-January to mid-February, one shot by Javian McCollum has taken a lot of pressure off Oklahoma heading into the final three games of the season. The Sooners were a No. 8 seed in Joe Lunardi’s bracketology prediction last week coming off three losses in their last five games. After appearing to be a lock for an NCAA…