Complex sentence: In 1964 Eller was drafted in the first round of the NFL draft by the Minnesota Vikings and also drafted in the first round of the American Football League Draft by the Buffalo Bills, who could not sign him.
Split into simpler sentences: In 1964 Eller was drafted in the first round of the NFL draft by the Minnesota Vikings. He was also drafted in the first round of the American Football League Draft by the Buffalo Bills, who did not sign him.