Pat Haden collapses before USC's game against Notre Dame. (NBC)

What has been a very strange week for USC got a little bit stranger on Saturday evening.

USC athletic director Pat Haden collapsed on the sideline before the Trojans' game against Notre Dame. Haden then got up under his own power before making the trip to the locker room.

USC sports information director Tim Tessalone told ESPN that after being treated in the locker room, Haden visited a local hospital, checked out OK, and left for Los Angeles ahead of schedule on a private plane.

Haden fired USC coach Steve Sarkisian earlier this week after Sarkisian allegedly showed up to practice inebriated.