I thought you meant the risk of transmitting the virus. And the risk to the players.
The problem is that at ND, by new official protocol, a positive test, even a very mild case, puts a student in mandatory quarantine; with a requirement of two negative tests three days apart, to get out.
And beyond ND general protocol, if the team tests, the same ND rule will apply. Kelly won´t be able to go around that.
Somebody on the team is going to hang around with somebody who parties off-campus and the virus will spread.
It is not 99.99% risk-free in terms of player availability.