In 1960 Frank Howard was selected NL Rookie of the Year with 50% of the votes powered by his 23 home runs. He went on to hit double digit dingers every year until leaving the Majors at the end of the 1973 season.
Ron Hanson received 22 of the 24 votes cast for AL Rookie of the Year. The other 2 votes went to Oriole teammates Chuck Estrada and Jim Gentile. In 1968 Hansen had the distinction of being traded for the same player twice in one year. In February the White Sox traded Hansen to the Senators in a 6 player trade that included Tim Cullen. In August the Senators sent Hansen back to the White Sox for Tim Cullen. It was the first time the same two players were traded for each other in the same season in the history of the MLB.