San Diego trailed Pepperdine by three points Saturday when its No. 2 scorer, Olin Carter (16.5 ppg), departed with an abdominal injury. The Toreros lost by 15, their first setback at home. He will be idled at Portland, where the Toreros have failed to cover in the last four visits. Their previous five games this season have produced just one cover. The Pilots have not impressed lately but can cash in on Carter’s absence.