Complex sentence: Brock was selected by the Chicago Bears in the second round (20th overall) of the 1962 NFL Draft and by the Houston Oilers in the eighth round (63rd overall) of the 1962 AFL Draft.
Split into simpler sentences: Brock was selected by the Chicago Bears in the second round (20th overall) of the 1962 NFL Draft. He was also drafted by the Houston Oilers in the eighth round (63rd overall) of the 1962 AFL Draft.