9 April 1993
|Curling club||Sundbybergs CK, |
|4 (2015, 2017, 2018, 2019)|
|4 (2016, 2017, 2018, 2019)|
|Grand Slam victories||4 (2018 Elite 10 (Sept.), 2018 Masters, 2019 Tour Challenge, 2019 National)|
Mabergs played lead on the Swedish junior women's team at the 2011 and 2012 World Junior Curling Championships, on teams skipped by Jonna McManus and Sara McManus respectively. At both events, Sweden placed fourth. Mabergs played third on the Swedish team, skipped by Sara McManus, at the 2013 World Junior Curling Championships. That team would place fifth. Mabergs played lead for the University of Gävle team representing Sweden (and again, skipped by Sara McManus) at the 2015 Winter Universiade. There, the team finished fourth.
Mabergs played lead for Sweden at the 2014 European Mixed Curling Championship on a team skipped by her brother Patric. After posting a 6-2 record in their group, the team would win three straight playoff games to claim the gold medal.
Mabergs was the alternate on the Swedish team (skipped by Margaretha Sigfridsson) at the 2015 World Women's Curling Championship. Mabergs did not play any games and the team finished 7th. In the off-season, Mabergs joined the Anna Hasselborg rink. The team would go on to win a silver medal at the 2016 European Curling Championships and represented Sweden at the 2017 World Women's Curling Championship where they finished fourth.
In February 2018, her team of Anna Hasselborg, Sara McManus and Agnes Knochenhauer won the Gold Medal at the 2018 Winter Olympics in PyeongChang defeating Kim Eun-jung in the final. The next month, the rink made it to the final of the 2018 Ford World Women's Curling Championship but they lost in an extra end to Canada's Jennifer Jones.
Mabergs won her first Grand Slam in the inaugural women's Elite 10 in 2018, going undefeated through the tournament and defeating Silvana Tirinzoni in the final. At the 2018 Masters, the Hasselborg rink won their second straight slam, defeating Rachel Homan in the final. The team lost the world final once again at the 2019 World Women's Curling Championship, this time to Silvana Tirinzoni.
- 2018 Ford World Women's Curling Championship Media Guide
- "Hasselborg makes GSOC history winning 1st Elite 10 women's title". www.thegrandslamofcurling.com. Retrieved 2018-09-30.
- 2019 Continental Cup Media Guide: Team Hasselborg