Mezue ahịrịokwu na-esonụ: Rooney nwere afọ 2011 na-akụda mmụọ, kpochapụrụ na ọkara ikpeazụ nke mita 400 na World Championships na Daegu ma mechie nke asatọ dịka akụkụ nke ndị otu Britain na 4 × 400 m relay. Na 2012 Martyn bidoro nke ọma, na-agba ọsọ 44.92s n'ọnwa Eprel na Mt. SAC Relays na Walnut, California, oge ya kachasị ọsọ kemgbe 2008. Rooney enweghị ike ijigide ụdị ahụ na-aga n'egwuregwu Olimpik nke ụlọ ya, a chụpụrụ ya na ọkara ikpeazụ nke mita 400, na-agba ọsọ 45.31. N'ime
4 × 400 mita relay ikpeazụ Martyn natara baton n'ọnọdụ nke isii wee gbaa ụkwụ arịlịka nke 44.1 nke abụọ, mana enweghị ike ịgafe Deon Lendore nke Trinidad wee si otú a bụrụ onye nke anọ.