Mabergs played lead for the University of Gävle team representing Sweden (and again, skipped by Sara McManus) at the 2015 Winter Universiade.

Mabergs played lead for Sweden at the 2014 European Mixed Curling Championship on a team skipped by her brother[2] Patric.

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.

Team Hasselborg began the 2019–20 season at the Stu Sells Oakville Tankard, where they defeated Anna Sidorova in the final.

They lost in the semifinal of the Masters to Tracy Fleury before winning the next three Slams, the Tour Challenge, National and the Canadian Open.

The team was set to represent Sweden at the 2020 World Women's Curling Championship before the event got cancelled due to the COVID-19 pandemic.

[6] The Hasselborg rink won the first event of the 2020–21 season, defeating Raphaela Keiser in the final of the 2020 Women's Masters Basel.

After defeating Canada's Kerri Einarson 8–3 in the qualification round, they lost a narrow 8–7 semifinal against the RCF, skipped by Alina Kovaleva.

[11] Team Hasselborg began the 2021–22 season competing in the men's Baden Masters tour event, where they missed the playoffs.

They then defeated Russia's Alina Kovaleva in the semifinal before dropping the final to Scotland's Eve Muirhead, settling for silver.

After a 4–1 round robin record, the team knocked off Isabella Wranå in the semifinal and the newly formed Kaitlyn Lawes rink in the championship game.

[19] In their first Slam of the season, the 2022 National, the team missed the playoffs with a 1–3 record, meaning they would not have the chance to repeat as champions for a third year in a row.

[27] At the 2023 World Women's Curling Championship, which was held in Sandviken, the team finished fifth through the round robin with a 7–5 record, enough to make the playoffs.

[32] At the best-of-seven European qualifier against Isabella Wranå, the team lost the series 4–2, meaning they would not represent Sweden for the first time since 2015.

At the Worlds, Team Hasselborg started with three consecutive losses before turning things around, finishing the round robin in fifth place with a 7–5 record.