Kammala jumla mai zuwa: Bayan wadannan abubuwan takaici, Brown ya sadaukar da lokacinsa na 2018 don mai da hankali kan Wasannin Commonwealth na 2018, wanda za a gudanar a Gold Coast. An kira shi zuwa ga tawagar Kanada don wasannin, musamman don yin gasa a cikin mita 200, Brown ya fara zama na uku a wasan karshe tare da lokacin 20.34. Koyaya, an cire mai kammala na biyu Zharnel Hughes daga gasar saboda turawa da wanda ya lashe lambar zinare Jereem Richards, wanda ya sa Brown ya lashe lambar azurfa. Wannan ita ce babbar lambar yabo ta farko a cikin aikin Brown, wanda ya yaba da cire "wannan guntu a kafaɗata a wannan shekara". Ya ci gaba da jin dadin nasara a kan
2018 Diamond League, yana gudanar da 200 mm a cikin sub-20 a karo na biyu (19.98) a karon farko a Wasannin Bislett a Oslo. Ya lashe lambar yabo ta Golden Spike Ostrava a kan zakaran zakarun duniya Ramil Guliyev.