 Lambert was the International Racquetball Federation World Junior Champion in Girl's U18 in 2011, when she defeated Vargas in the final, 4-15, 15-7, 11-4.She was also World Junior Champion in Girl's U14 in 2007.Lambert had a career high ranking in the 2016-17 Ladies Professional Racquetball Tour (LPRT) season, as she reached #2 and finished there at the end of the season, which was her fourth consecutive top 10 finish.