So step back a minute and consider what you're saying.
In particular, pay attention to four key facts:
(a) these lads are being tested for covid-19 three times a week. Every two days, more or less. They know if they've gotten it very quickly, much more quickly than you and I.
(b) the hazard only lasts about two weeks. That's how long a young, healthy person who has covid-19 is a hazard to pass it on to others.
(c) most college kids go home 2-4 times a year. Thanksgiving maybe, Christmas/New Years, spring break maybe, and summer. Football players usually do not go home at Thanksgiving (mid-season). So the next opportunity most of our lads have to get home to family members is not for another three months or so. But even for those few who live locally and could go home any given weekend,...
(d) our lads have brains. They're capable of thinking through the risks they may pose to a parent, grandparent, or other loved one. They also have hearts. They'll care enough to avoid contact with those loved ones if they think there's a chance they may be carrying the virus.
Put those four facts together, and you'll see that the risk of the lads passing covid-19 on to a vulnerable family member is actually very low. I certainly wouldn't rearrange their lives around it. Instead, I would let them manage it themselves.
Let's don't mouth-breathe over this, and let's do give our players credit for being intelligent, thoughtful human beings.
We really don't need this severe level of control over them. We're over-doing it. Purely to assuage the heavy mouth-breathing of those alarmists (and political opportunists) who happen to hold key political offices or positions in college administrations...so we can play football.
p.s. Contrast the level of control our universities are exerting over our players with the level of control they exercise over the rest of the student body. Thrice-weekly testing? Oh no, I think probably no testing at all unless the student goes to the health center and asks for one, or unless contact tracing points them out. Controlling when they get home? As far as I know, not at all. I'm sure the university is reminding all students to be careful and thoughtful with visits home, but their schedules are much more open than the football players at this time of year. It is striking, once you think about it. No, all this extra effort isn't to protect grandma. The effort is to satisfy nega-covid19s (i just invented that term, heh) like the governors of North Carolina and Michigan so that the lads can play football (hasn't worked yet--yet--with the Michigan one).
When you bring reason and critical thinking to the table concerning this subject which you did in the above, it's usually followed by a deluge of emotion and hysterics of "what about the kids?????" People are about hystericed out over this virus and it is waaaaaay overdue IMO.