Buuxi weedhan soo socota: Felix wuxuu mar kale tartanka ku soo laabtay August 10, 2012, isagoo qayb ka ahaa tartanka haweenka
Kooxda 4 × 100 mitir ee Tianna Madison, Bianca Knight, iyo Carmelita Jeter. Afartaan ayaa ku guuleystay waqti 40.82 ilbiriqsi, iyagoo jabiyay rikoodhka adduunka ee muddo dheer la haystay ee 41.37 ilbiriqsi, oo ay dejisay Jarmalka Bari bishii Oktoobar 1985. Habeenkii ugu dambeeyay ee ciyaaraha fudud, Ogosto 11, 2012, Felix wuxuu ku orday lug 48.2 ilbiriqsi ah kooxda haweenka Mareykanka ee 4 × 400 mitir oo ay la socdaan DeeDee Trotter, Francena McCorory, iyo Sanya Richards-Ross, isagoo ku guuleystey waqti ah 3: 16.87, waqtiga saddexaad ee ugu dhakhsaha badan taariikhda Olombikada ee ka dambeeya Midowgii Soofiyeeti iyo Mareykanka Olombikada Xagaaga ee 1988, iyo waqtiga shanaad ee ugu dhakhsaha badan guud ahaan, ilaa waqtigaas.