Mezue ahịrịokwu na-esonụ: Sundgren malitere ọmụmụ mahadum ya na Karlstad n'oge mgbụsị akwụkwọ nke 2009 ma soro ndị otu egwuregwu dị iche iche n'oge a. N'oge 2010-2011 oge, ọ na-egwuri egwu na atọ dị iche iche ìgwè. Maka Elite Series, ọ hapụrụ ndị otu Karlstad nke Oskar Eriksson hapụrụ na 2008, sonyeere nwanne Oskar bụ Markus Eriksson, yana Marcus Franzén na Henric Jonsson n'ịmepụta Team Sundgren. Ọ hapụrụkwa ndị otu Sweden n'asọmpi ahụ.
2011 Winter Universiade, na-eduga ndị otu Alexander Nordgren, Axel Rosander na Johan Spiik, ọ bụ ezie na ndị otu ahụ kwụsịrị asọmpi ahụ n'ọnọdụ 8. Sundgren hapụrụ ndị otu ya, Lag Sundgren, maka Karlstad na Swedish Men's Junior Curling Championship, na-efunahụ oke njedebe na ndị otu ya mbụ Oskar Eriksson, Kristian Lindström, Alexander Lindström, na Henrik Leek. Ọ sonyeere ha ọzọ maka asọmpi World Junior Curling Championship nke afọ 2011, wee nweta ihe nrite ọla edo. Ọ bụ ezie na Sundgren bụ onye nnọchi anya ya ma ghara igwu egwuregwu ọ bụla na round-robin, ọ gbara egwuregwu mmeri dị mkpa na ọkara ikpeazụ na nke ikpeazụ mgbe Henrik Leek nọ n'okpuru ihu igwe ma dị mkpa maka mmeri ọla edo.