Rubuta ci gaba don wannan sakin layi - Mayock ya yi gasa a wasannin Olympics uku, a wasannin 1996 a Atlanta da wasannin 2000 a Sydney a cikin mita 1500 da kuma wasannin 2004 a Athens a cikin mita 5000. Ya kuma yi gasa a wasanni uku na Commonwealth, a 1994 a Victoria
da 1998 a Kuala Lumpur, inda ya lashe lambar tagulla da azurfa a mita 1500. Ya kasance na huɗu a cikin 5,000, a Wasannin Commonwealth na 2002 a Manchester. A halin yanzu yana riƙe da rikodin cikin gida na Burtaniya don mita 2000 (4:57.09) da mil 2 (8:17.06). Rikodin sa na baya a cikin mita 3000 (7:41.09) Mo Farah ya karya a shekarar 2009. Mayock ya wakilci Burtaniya sau 58 a lokacin aikinsa. Ya yi tsere mai ban sha'awa na 3: 31.86 don 1500m da mil a cikin 3: 50.32.