A product of the first-ever
Hogan Cup-winning
St. Joseph's CBS team, Behan's performances quickly brought him to the notice of the county selectors and he was a substitute on the
Dublin minor team that won the
All-Ireland Championship in 1958 when
Mayo were beaten in the final. Behan broke onto the minor starting fifteen and claimed a second successive title the following year before lining out with the Dublin junior team in 1960. Around this time he also win the first of three
County Championship titles with
St. Vincent's before being included on the Dublin senior team. Behan won a
Leinster Championship medals in 1963, and he was part of the team that won the
1963 All-Ireland final by defeating
Galway. ==Personal life and death==