Hall of Fame quarterback John Unitas, 59, was hospitalized at the University of Maryland Medical Center last night after complaining of chest pains after knee surgery, according to reports.
A hospital spokeswoman would not release any information except to say that Unitas' condition was serious, as of midnight last night.
WJZ-TV reported that Unitas experienced chest pain and an abnormal electrocardiogram and was placed in the hospital's cardiac care unit as a precaution.
Unitas played with the Colts from 1956 to 1973. He was traded to the San Diego Chargers in 1973 and retired that year.