Seamus Downey competed in the individual road race event at the 1984 Summer Olympics, his son Sean Downey winning a Bronze medal in the 2010 Commonwealth Games in the team pursuit as part of the Northern Ireland team and riding for the An Post–Chain Reaction team between 2012 and 2015, and Mark Downey competing at the 2015 UEC European Track Championships in the points race and team pursuit. Mark won the gold medal at the 2016–17 UCI Track Cycling World Cup, Round 2 in Apeldoorn in the points race. He also won the third round of the World Cup points race held in Cali, Colombia and picked up a Silver in the Madison with his team mate Felix English. Mark concluding his 2017 World Cup campaign by winning the Madison in Los Angeles Round 4 and was overall series winner in the points race.