My bet is most teams will lose several players in early January. Not all at once, and most will be asymptomatic, but they'll each be out for 5 days.
Assuming the teams each have a deep bench, schedules should be more or less intact.
If it gets bad, you may also have some schools which extend winter break a week or two.
Entire teams had games scratched for the football season up and down California not just because a few players were sick but the entire team was exposed during practice. At the early part of the season when the wave was still "high" in SoCal, there were a moderate amount of disruptions to the football schedule. I know the CDC guidance has been tweaked, but have the sports quarantine rules in California changed?