Ku sii qor faqradan - Markii ugu horraysay ee ay tartan ku baxdo waxay ahayd 2006, markii ay samaysay rikoorkeedii ugu fiicnaa ee 1:16:48 saacadood iyada oo ku guuleysatay kaalinta labaad ee orodka nus-marathon-ka ee Mazatlán waxayna diiwaan gelisay waqti 2:51:32 saacadood ah oo ay ku guuleysatay Marathon-ka Magaalada Mexico. Waxay hagaajisay waqtigeedii ugu fiicnaa ee marathon-ka oo ahayd 2:43:21 saacadood sanadkii xigay waxayna ku guuleysatay billaddii lacagta ahayd ee 5000 m ee 2007 NACAC Championships ee San Salvador. Romero waxay markii ugu horreysay ka soo muuqatay marxaladda caalamiga ah ee 2009 IAAF World Half Marathon Championships waxayna ku dhameysatay kaalinta 39aad. Sannadkii xigay waxay marathon ku orodday 2:42:33 saacadood León, Mexico ka hor inta aysan ku guuleysan bilada dahabka dumarka ee dhacdada Ciyaaraha Bartamaha Ameerika iyo Kariibiyaanka 2010. Waxay ku orodday nus marathon ugu fiican 1:14:13 saacadood ee 2010 IAAF World Half Marathon Championships
waxay ku dhamaatay kaalinta 22-aad tartanka dumarka.