In football, Sixkiller was an All-Southern Oregon Conference selection and a second team all-state selection. He was a back-up at quarterback as a sophomore to senior Gene Willis, who later played at Washington.
Sixkiller was recognized as a standout athlete in football, earning All-Southern Oregon Conference honors and being named a second team all-state selection. He served as a backup quarterback during his sophomore year while Gene Willis, his senior teammate, later played at Washington.