William Michael Kellagher (August 13, 1920 â May 11, 2003) was an American professional football fullback and safety who played for the Chicago Rockets of the All-America Football Conference (AAFC).
Kellagher played for the Rockets from 1946 to 1948. In 1947, along with Tommy Colella and Len Eshmont, Kellagher co-led the AAFC with 6 interceptions. Also in 1947, Kellagher ended Cleveland Browns quarterback Otto Graham's streak of 91 consecutive pass attempts without an interception, a professional football record at the time.