|Date of birth||September 3, 1943|
|Place of birth||Dublin, Ireland|
|1971–1972||St Patrick's Athletic||5||(2)|
|League of Ireland XI||4||(1)|
|* Senior club appearances and goals counted for the domestic league only
Hannigan had three different spells with Shels as a player from 1961–66, 1972–74, and finally in the 1980/81 season.
His first spell was the most successful as Shels won the league championship in 1962 after defeating Cork Celtic in a play-off and then defeating Cork Hibernians in the following year's FAI Cup final.
In December 1965 he signed for Wrexham but was soon back home with Dundalk where he won the League in 1967. He scored over 50 goals for the Oriel Park side.
Hannigan then signed for Shamrock Rovers in April 1969 and made his debut on the 6th of April. He won the FAI Cup in his first season and represented Rovers twice in European competition against Schalke 04. In Finn Harps first ever game in the League of Ireland Ben scored 4 times in a 10-2 win on 17 August 1969.
Hannigan later signed for Sligo in February 1971. He scored on his debut on February 28. In his time at the Showgrounds he played a total of 6 games scoring once. This was followed by a short spell at Fortuna Köln in the early stages of the 1971-72 season but unlike Noel Campbell, whom Fortuna had signed simultaneously, Hannigan went back home soon.
Earned 4 Inter-League caps.
- League of Ireland: 3
- FAI Cup: 2
- Dublin City Cup
- Dundalk F.C. - 1968
- Kicker Sportmagazin announced him as a signing from Sligo Rovers. The same magazine, in # 82 of 1971, p. 31, says Hannigan left before having played a league match.