[2] In 2009, she entered the national team in her first year as a junior, making her international debut at the Deleanu Cup in Bucharest, being 1st with rope, 2nd with ball, 3rd in the All-Around, 4th with clubs, and 6th with hoop.

[5][6][7][8][9] She was then selected for the Junior Pan American Championships in Havana, where she won gold in teams (along Polina Kozitskiy and Alexis Page), the All-Around, rope, hoop and ball.

[2] She then took 5th place at the Crystal Rose tournament in Minsk and won gold in the All-Around and silver with ball at the Chicago Cup.

[12][13] In the following seasong she debuted at the 2011 Rhythmic Challenge in Colorado Springs, getting gold in the All-Around, with hoop and with ball, silver with clubs and bronze with ribbon.

[33][34] A month later she competed in the Pan American Championships in Mississauga, Ontario, where she won gold in team with Jasmine Kerber, Serena Lu and Aliya Protto, and silver in the All-Around.

[37] In April 2015 Rebecca retired from the sport due to an ongoing back complaint that had been plaguing her since 2012; she has been diagnosed with a variety of conditions, including herniated discs and arthritis.