Allyson Felix participant in 2012 Summer Olympics
Personal bests
At the 2012 Summer Olympics Felix ran the second leg of the 4 × 400 meters relay in a time of 48.2 seconds.
At the 2015 World Championships Felix ran the third leg of the 4 × 400 meters relay in a time of 47.72 seconds, which is the fastest 4 × 400 meters split ever by an American woman and third-fastest 4 × 400 meters split ever by any female athlete, after Jarmila Kratochvílová and Marita Koch.
engaged in involved in took part in played a role in contributed to