Found this from a post in a UCLA FB group:
Media asked this DB how they held UCLA to half its avg rushing yards. "I think we just had their number. They're fairly simple and there's a lot of tells. Plus we were just physical."
Separately the coach said they had practiced two tackling styles for Knight all week, one high and one low, based on broken tackles they saw. The longer the season, the more things get exposed. We will need to stay inventive.