Atlanta Hawks coach Nate McMillan entered the NBA's health and safety protocols on Saturday.

McMillan's top assistant, Chris Jent, entered the protocols earlier in the week. With McMillan and Jent both unavailable, assistant coach Joe Prunty is expected to serve as the Hawks' acting head coach against the Portland Trail Blazers on Monday, sources told ESPN's Adrian Wojnarowski.

The plan will be for Prunty to take over until one of his two colleagues is cleared, sources said.

Prunty was 21-17 as the Milwaukee Bucks' interim coach in 2017-18 following the firing of Jason Kidd.

Including McMillan, 11 of the NBA's 30 coaches have spent time on the league's COVID-19 list this season.