 At the 2009 London Grand Prix, she placed first in the 100 m, clocking a personal best of 10.92; it was the third-fastest time at that point of the season, only slower than Jamaica's Shelly-Ann Fraser and Kerron Stewart.A week prior to the start of the World Championships, Jeter was part of a United States 4 × 100 m relay team that ran the fastest women's sprint relay in twelve years.Lauryn Williams, Allyson Felix, Muna Lee, and Jeter finished with a time of 41.58 seconds, bringing them to eighth on the all-time list.