Original: Joseph Clifford Montana , Jr. , ( born June 11 , 1956 ) , nicknamed Joe Cool and Comeback Joe , is a retired American football player whose professional career in the National Football League ( NFL ) spanned the late 1970s through the mid-1990s .
Simplified: Joseph Clifford Montana , Jr. ( born June 11 , 1956 ) was a quarterback for the San Francisco 49ers and the Kansas City Chiefs of the National Football League .