In 1991, Overton-Clapham made her first trip to the Scott Tournament of Hearts, Canada's national women's curling championship.

The team won the Hearts that year, and went on to win the silver medal at the 1995 Ford World Curling Championships, losing to Sweden's Elisabet Gustafson in the final.

Now, skipping the squad, Jill Staub, was brought in at third, Debbie Jones-Walker and Janet Arnott remained at second and lead.

[3] The win was Overton-Clapham's 5th Scotties title in total and moved her one off of Colleen Jones in the record book and alongside the legendary Joyce McKee of Saskatchewan and Nova Scotians Mary Anne Arsenault, Nancy Delahunt, and Kim Kelly.

However young third Breanne Meakin qualified for the 2011 Canadian Junior Curling Championships, forcing Overton-Clapham to find a new third for the 2011 Manitoba Scotties Tournament of Hearts.

Overton-Clapham's team played Jennifer Jones' rink in the round-robin at the 2011 Scotties Tournament of Hearts on February 23.

Overton-Clapham would win the match 8–5, the crowd cheered her every shot, and were chanting "Cathy-O" as the two teams shook hands.

Her second Leslie Wilson decided she wanted to take a year off from curling and her lead Raunora Westcott was unsure as to what she would do.

[10] Overton-Clapham's team found early success in the season when they won the first Grand Slam Event, the 2011 Curlers Corner Autumn Gold Curling Classic.

Modifying her initial lineup, Loder moved to third, Howard to second and Meakin to lead, the team won the third qualification.

In the playoffs Overton-Clapham defeated Stefanie Lawton, Sherry Middaugh and in the final Amy Nixon to win the championship.

[11][12] At the 2012 Players' Championship team Overton-Clapham finished at the top of the standings at the end of the round robin, with a 6–1 record.

Although the team eventually lost the final to Lawton, their overall performance in Grand Slam events of the season gave them the Capital One Cup for 2012 and a $50,000 prize.