Career
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.
Kellagher died on May 11, 2003 in Philadelphia.