John O’Mahony led three Connacht counties to some of their greatest football days before emerging as a significant political figure as a Fine Gael TD and senator. Although he had battled illness in recent years, his death was unexpected and occasioned enormous grief throughout the GAA and political communities.

O’Mahony earned his reputation as a pioneering leader through historic triumphs with Mayo, Leitrim and Galway. He was a relentless breaker of glass ceilings. The force of his will elevated each county to heights none had experienced in many decades. He managed those three counties to eight Connacht Senior Football Championships. He was thus one of the most influential GAA figures in the province over the past 60 years.

John O’Mahony was elected as a Fine Gael TD in Mayo at the 2007 General Election and served in that position until 2016. In May of 2016, then Taoiseach Enda Kenny nominated him to the 25th Seanad.

Taoiseach Simon Harris paid tribute, saying "John was a sporting hero, a champion and a gentleman.

"On the sporting field, John left a stunning legacy in Mayo, Leitrim and Galway, where they still talk about his All-Ireland wins of '98 and ‘01. He was a leader, he made people believe in their own abilities and he delivered at the highest levels.

"On the political field, John's determination to deliver was no less fierce than in sport. He was decent, hardworking, effective and respected.