I te tau 2011, ka hoki mai a Sundgren ki tana kapa o mua i Lit mo te nuinga o te waa i te wa e ora ana a Alexander Lindström mai i te pokanga, ka awhina i a raatau ki te mutu i te waahi tuatahi i te haerenga a Elite Series a Sweden (ahakoa ko te tuarua i nga whiringa toa). I takaro a Sundgren me te tiima i te nuinga o te haerenga a nga kaumatua o te ao mo te haurua tuatahi o te tau, me te mutunga o te waa i nga Kaiwhakaako Pakeha. Mo te tau 2012-2013, ko Sundgren te kaiarahi wa-katoa mo Team Eriksson i te wa i neke ai te tiima ki Karlstad, i uru mai a Markus Eriksson hei tuarua, i te mea i hoki whakamuri a Alexander Lindström me Henrik Leek mai i te curling. Ki te kapa hou kua whakahoutia, i wikitoria a Sundgren me ona hoa kapa i te Swiss Cup Basel (2012) me te European Masters (2013), tae atu ki te Winter Universiade (2013). I te tau 2013-14, i eke a Team Eriksson ki te waahi tuarua i te Swiss Cup Basel, Mercure Perth Masters, me te Swedish Elite Series ka whakataetae i Kanata i runga i te World Curling Tour, ka eke ki te tuarima o nga huihuinga e toru ka eke ki to raatau Grand Slam Quarterfinal tuatahi i te National. I te wikitoria i te Swedish Men's Curling Championships i taua tau ano, i tohua te kapa ki te tohu mo Sweden i te 2014 World Men's Curling Championship
, i te mea ko te Team Edin i tohu i a Sweden i te European Curling Championships. Ahakoa i hinga te kapa ki a Team Norway i te whiringa toa, ka hinga i a Team Canada, i eke a Kevin Koe e rua nga wa i roto i te kaupapa.