Rubuta ci gaba ga wannan sakin layi - Felix ya sake komawa kan hanya a ranar 10 ga Agusta, 2012, a matsayin wani ɓangare na mata 4 × 100 mita relay
kungiyar tare da Tianna Madison, Bianca Knight, da kuma Carmelita Jeter. Hudu sun yi nasara da lokacin 40.82 seconds, suna karya tarihin duniya na tsawon lokaci na 41.37 seconds, wanda Jamus ta Gabas ta kafa a watan Oktoba 1985. A daren karshe na wasannin motsa jiki, 11 ga Agusta, 2012, Felix ya yi tsere na dakika 48.2 a kan tawagar 'yan matan Amurka 4 × 400 tare da DeeDee Trotter, Francena McCorory, da Sanya Richards-Ross, sun yi nasara a cikin lokaci na 3: 16.87, lokaci na uku mafi sauri a tarihin wasannin Olympic a bayan Tarayyar Soviet da Amurka a Wasannin Olympics na 1988, kuma lokaci na biyar mafi sauri gaba ɗaya, har zuwa wannan lokacin.