Kilroy was signed by the
Philadelphia Eagles as an
undrafted free agent in 1943. He played both offensive and defensive line in the
National Football League (NFL) for 13 seasons, all with the Eagles. He also was often called one of the toughest, if not the dirtiest, player of that era. Despite that reputation he won two
NFL championships in the 1948 and 1949 seasons. He was a
Pro Bowl selection 3 times during his career, missing only one of 203 games because of an injury. He also played in 147 consecutive games, which was a league record at the time. A
two-way line starter for championship teams in 1948 and 1949 and for runners-up in 1947, Bucko helped
Steve Van Buren win several NFL rushing titles in that time span. He also had 5 career
interceptions on defense. Hall of Famer defensive tackle
Art Donovan had this to say about him: "The beginnings of the Colt-Eagle rivalry probably had something to do with a guy named Frank Kilroy. They called him Bad News Kilroy, and he was. The dirty bastard was a legend by the time I got into the league. It was the first thing they warned a rookie: 'Watch out for the Irish bum'. He was really pretty unbelievable. He took kickoffs literally. He'd run downfield kicking people, just kicking them out of bounds. And he never got called for it. The officials would just let him do it". ==After playing career==