LOS ANGELES (AP) — Southern California has fired head football coach Steve Sarkisian just a day after athletic director Pat Haden determined Sarkisian showed up at school in no condition to lead practice.

USC hasn't elaborated on Sarkisian's problems, but the second-year coach had an embarrassing public display in August at a pep rally where he appeared to be intoxicated while giving a speech. Sarkisian later apologized and said he had combined alcohol and medication, but promised not to drink again during the season.

Offensive coordinator Clay Helton was appointed interim coach Sunday and will officially lead his first practice Tuesday.

Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.