Kammala wannan jumla: A Wasannin Olympics na bazara na 2012 a London, Thoman ya lashe lambar yabo ta Olympics ta farko, azurfa, a
100 mita a baya. A wasan karshe, Thoman ya zama na biyu a bayan ɗan'uwansa Ba'amurke Matt Grevers tare da lokacin 52.92. Ya kuma sami lambar zinare ta yin iyo a kafa ta baya ga tawagar Amurka da ta yi nasara a wasan farko na tseren mita 4×100.