Ohio State coach Ryan Day has tested positive for COVID-19 and will not be with the Buckeyes if they play at Illinois on Saturday.

Ohio State said Friday it had an increased number of positive COVID-19 tests in the program this week. The game against the Illini was still on, but the Buckeyes were not traveling on Friday as originally scheduled.

Ohio State said it planned to do a second round of testing Friday before flying to Champaign, Illinois, on Saturday ahead of the game scheduled for noon EST.

Buckeyes assistant head coach/defensive line coach Larry Johnson will act as interim coach with Day unavailable.

“I have spoken with Coach Day, and he is doing well physically,” Ohio State athletic director Gene Smith said. “I feel terrible for Coach and for the members of the program who have been diagnosed with a positive test. Coach Day and this team have been true leaders in handling things so well throughout this pandemic. Our team wants to play this game, and we’re going to do everything we can to help make this happen.”

Ohio State did not specify how how many cases of COVID-19 it currently has in its football program, but the school did say the team had not reached the threshold to have to cancel its game.

The Buckeyes (4-0) already have had one Big Ten game canceled because of an outbreak at Maryland and have three left on the schedule, including at Illinois.

Big Ten rules state a team needs to play at least six game to be eligible to play for the conference championship, unless the average number of games played throughout the league is below six. In that case, teams would be eligible to play in the conference title game as long as they are within two of the average.

The Big Ten started its season the weekend of Oct. 24 and scheduled no open dates for makeups in its eight-week, regular-season schedule.