Ohio State announced on Friday that head coach Ryan Day has tested positive for the coronavirus and will not travel with the team as it heads to take on Illinois in Champaign on Saturday.

Larry Johnson, the team’s defensive line coach, will serve as interim head coach in place of Day. The Buckeyes are 4-0 and were ranked No. 4 in the first College Football Playoff rankings of the year, released on Tuesday.

“Head coach Ryan Day is one of the individuals who has tested positive,” an Ohio State statement reads. “He is in isolation and will not travel to Illinois or coach the team this week. Assistant head coach/defensive line coach Larry Johnson will serve as interim head coach of the Buckeyes on Saturday.”

Day becomes the 2nd head coach of a top 5 FBS team this week to receive a positive COVID-19 test set to keep him off the sideline.

On Wednesday, Alabama head coach Nick Saban tested positive, but unlike his previous positive test leading up to the Crimson Tide’s game against Georgia that was considered a false positive, he is symptomatic and will not be with the team in the Iron Bowl against Auburn. Offensive coordinator Steve Sarkisian will be the acting head coach for that game.

Alabama enters the game with a No. 1 ranking in the CFP Top 25, while Auburn is ranked No. 22.