Faatumu le fuaiupu lenei: Ina ua manumalo i se pine siliva i le 50 mita i le susu ma se pine apamemea i le 100 mita i le susu i le European Junior Swimming Championships 2004 i Lisbon, Potukale. Na faia e Stekelenburg lana uluai taaloga i le 2005 World Aquatics Championships i Montreal, Quebec, Kanata lea na aveesea ai o ia i le 50 m ma le 100 m breaststroke. I tausaga na sosoo ai, na ia aau ai i le tele o siamupini a Europa ma faia ai lana faatinoga sili i le
2008 European Aquatics Championships i Eindhoven i lona atunuʻu o Netherlands, faʻaiʻu lona 6 i le 50 m breaststroke faʻaiʻu ina ua uma ona aau se faʻamaumauga a le atunuʻu i le semi-faʻaiʻuga.