Chicago White Sox manager Tony La Russa is out indefinitely with an unspecified medical issue, a source confirmed to ESPN's Jesse Rogers.
Bench coach Miguel Cairo will manage the White Sox on an interim basis while La Russa undergoes further testing, the source told Rogers.
USA Today Sports first reported Wednesday that La Russa would be out indefinitely.
Cairo said after Tuesday's loss to the Kansas City Royals that the White Sox hoped to learn more about La Russa's status Wednesday.
"We are going to keep him in our thoughts and hopefully everything is fine," Cairo said.