Whelan had a very successful playing career with his clubs, he first won the Dublin Senior Football Championship with Clanna Gael in 1968.
In the semi-final on October 30, 2006 at Parnell Park, his team brushed aside northside rivals Na Fianna and go on to contest UCD in the final which they eventually lost.
Mickey then went on to manage St Vincents to a win the Leinster Senior Club Football Championship final against Tyrrellspass of Westmeath.
[1] Whelan stepped down as manager of St Vincents only two weeks after their historic all-Ireland victory over Nemo Rangers in 2008.
This happened only a few months after Mickey had managed Pat to win the All-Ireland Senior Club Football Championship.