s ▁m ating ▁her ▁to ▁his ▁st all ion , ▁Joe ▁Hook er . ▁El ▁Rio ▁Rey ▁was ▁a ▁full ▁brother ▁to ▁the ▁good ▁race hor se , ▁Emperor ▁of ▁Nor folk ▁and ▁Cz ar ▁as ▁well ▁as ▁six ▁other ▁horses . ▁These ▁col ts ▁were ▁in bre d ▁to ▁Glen co e ▁in ▁the ▁third ▁and ▁fourth ▁( 3 m ▁x ▁ 4 f ) ▁generation . ▁ ▁Racing ▁record ▁El ▁Rio ▁Rey ' s ▁race ▁condition ing ▁was ▁super vised ▁by ▁the ▁head ▁of ▁the ▁The odore ▁Winter s ▁racing ▁stable , ▁Alfred ▁H . ▁Est ell , ▁as ▁well ▁as ▁tra iner ▁William ▁H . ▁McC orm ick . ▁As ▁a ▁two - year - old ▁racing ▁in ▁ 1 8 8 9 , ▁El ▁Rio ▁Rey ▁competed ▁at ▁rac etra cks ▁in ▁Chicago ▁and ▁St . ▁Louis , ▁Missouri ▁before ▁heading ▁to ▁New ▁York ▁City ▁where ▁the ▁public ity ▁surrounding ▁his ▁racing ▁ab ilities ▁as ▁a ▁full ▁brother ▁to ▁the ▁great ▁Emperor ▁of ▁Nor folk ▁drew ▁a ▁huge ▁crowd ▁to ▁Morris ▁Park ▁Race course ▁to ▁see ▁him ▁win ▁the ▁August ▁ 2 5 ▁Great ▁Eclipse ▁St akes . ▁On ▁the ▁same ▁track , ▁he ▁then ▁won ▁the ▁inaug ural ▁running ▁of ▁the ▁six ▁f url ong ▁( 1 , 2 0 0 ▁meters ) ▁White ▁Pla ins ▁Hand ic ap ▁on ▁August ▁ 3 1 ▁against ▁a ▁field ▁of ▁ 1 4 ▁horses ▁in ▁track ▁record ▁time ▁while ▁carrying ▁ 1 2 6 ▁pounds ▁( 5 7 ▁kil og