While making a comeback in 1969 , Clancy suffered an injury to his other knee .
After a sensational rookie season , Clancy suffered a serious knee injury in a 1968 exhibition game and missed the entire season .
While making a comeback in 1969 , Clancy suffered an injury to Clancy 's other knee .
After a sensational rookie season , Clancy suffered a serious knee injury in a 1968 exhibition game and missed the entire season .