He joined the club at age 12 and quit hockey two years later, because the matches and races were both on Saturdays, and he preferred the successes and more competitive nature of cycling.

When Haak and Büchli, the top 2 riders of the Netherlands, ended up on 63rd and 64th place at the sprint of the 2009 Junior World Championships in Moscow, they got inspired to do better.

The team successes inspired Theo Bos and Roy van den Berg to return to track cycling.

[4] In the 2010–11 UCI Track Cycling World Cup Classics Haak won silver in Beijing, China, at the 1 km time trial.

In the 2013–14 UCI Track Cycling World Cup he won a gold medal in Guadalajara, Mexico, at the sprint and bronze at the 1 km time trial.

While being injured, Haak went to Hong Kong with the team, where he was roommate and mentor of Harrie Lavreysen who had recently switched from BMX racing.

Haak was now approached by NOC*NSF to join their program of training retired athletes to become coaches and returning them to their original teams.

In three years, 2019 to 2021, the Dutch track racers won 26 golden, 12 silver, and 4 bronze medals on Olympic, Worlds and European Games and Championships.