Brendan O'Connell competed at two Olympic Games, the 1972 Munich and 1976 Montreal Olympics, as one of the pioneers of Irish canoe sprint on the international stage.
At Munich he competed in the K-2 1000m alongside Howard Watkins, setting an Irish record of 3:45.18 in the repechage, and also competed in the K-1 1000m.
He later became President of the Irish Canoe Union. For Montreal, O'Connell prepared with characteristic dedication, converting his garage into a makeshift gym and combining dry-land training with sessions on the River Liffey alongside his day job.
He competed in two events at Montreal with Declan Burns as his K-2 partner. In the K-2 500m, the pair had completed two excellent time trials at full effort in the two days before the race - a confidence-building exercise that, as O'Connell later recalled, 'emptied their sharpness' and left them performing well below their capabilities on competition day.
Their heat time of 1:56.86 placed them among the slower boats in the opening round, with Romania's heat-winning time of 1:43.86 underlining the standard of the competition. The pair responded strongly in the repechage, recording a considerably faster 1:47.56, but were eliminated. O'Connell later reflected candidly on the experience, recalling the physical and emotional toll of competing at Olympic level, and described it as a race that left him determined to come back stronger.