Kurtis Roberts
He is the youngest son of three-time 500cc World Champion Kenny Roberts , and the younger brother of 2000 500cc World Champion Kenny Roberts , Jr . . 
<triplet> Kenny Roberts <subj> Kenny Roberts, Jr. <obj> child <triplet> 2000 <subj> 2000 <obj> point in time <triplet> Kenny Roberts, Jr. <subj> Kenny Roberts <obj> father