The private boarding school has a national powerhouse of a boys basketball program.
The WIAA reiterated that it's likely all regions of the state will not be competing equally this fall.
The rising senior is the second of Hugh Millen's sons to earn a Pac-12 scholarship.
Pending the OK from the Department of Health, the WIAA is planning for practice to start on time in August.
Decisions on what high-school sports will look like in the fall are coming over the next month.
There's no sure answers for what the state's high-school football scene will look like at the end of summer.
Memorial Day weekend was the traditional end of high-school sports year. This year it came much sooner.
Seafair said the decision came with guidance from local and state governments.
The WIAA has three proposals that it is seeking public opinion on its app.
The addition comes after a two-year experiment with state football was regarded as successful.