Zeiger competed at the first Olympic triathlon at the 2000 Summer Olympics. She placed fourth with a total time of 2:01:25.74. Her split times were 19:45.58 for the swim, 1:05:38.30 for the cycling, and 0:36:01.86 for the run.
In 2008, Zeiger won the Ironman 70.3 World Championship in Clearwater, Florida with a time of 4:02.49.
Zeiger named the 1997 Amateur Triathlete of the Year. In 1998, she was named 1998 USA Triathlon's Rookie of the year and in 2000 the USOC Triathlete of the year. Zeiger was honored by the Jewish Sports Hall of fame in March 2001.