Famed Notre Dame coach Ara Parseghian, 94, is undergoing treatment for an infection in his hip.
Parseghian has had five operations on the hip, the Chicago Tribune reports, and currently is being treated at a care facility in South Bend, Indiana.
Another surgery isn't an option for Parseghian because of his age, and the infection is being treated with antibiotics.
Former players were told via email that Parseghian isn't accepting visitors at this time and were asked to write letters to his home in Indiana.
Parseghian was 95-17-4 in 11 seasons with Notre Dame starting in 1964, and he led the Fighting Irish to national titles in 1966 and 1973.