She won bronze in all-around at the Calais de France and at the 2013 Schmiden International, as well as qualifying to all 4 event finals.

At the 2014 World Cup Final in Kazan, Russia, Kerber finished 13th in all-around ahead of Japan's Kaho Minagawa.

On September 22–27, Kerber competed at the 2014 World Championships and finished 19th in the all-around finals behind Ukrainian gymnast Viktoria Mazur.

On April 10–12, Kerber finished last in 56th place in the all-around at the 2015 Pesaro World Cup after withdrawing from last 2 apparatus events.

On May 8–10, she competed at Corbeil-Essonnes International Rhythmic Gymnastics Tournament and finished 5th in all-around, she qualified to 3 event finals and placed 4th in ball, 7th in hoop and 8th in ribbon.

On September 9–13, Kerber (together with teammates Laura Zeng, Camilla Feeley and Serena Lu) competed at the 2015 World Championships in Stuttgart, with Team USA finishing 9th.