Notre Dame and USC engaged in a halftime conflict soon after the second quarter ended with the No. 9 Fighting Irish holding a 17-3 lead at home.
Keely Eure of USCFootball.com shot footage of the encounter's tail end:
Madness ensued at the end of the half. Most of #USC’s players were halfway to the locker room when they noticed a small skirmish and then turned back to join their teammates: https://t.co/ZdYoLiV8bx
Antonio Morales of The Athletic provided more context:
#USC and Notre Dame had a sizeable meeting at midfield after the half ended.