Ken Griffey Jr. – 56
Griffey Jr. hit 56 home runs for back-to-back seasons with the first coming in 1997. They came toward the end of his time in Seattle where he evolved into one of the league’s most effective players. He won the MVP award because he was magnificent and achieved all of the first-place votes.
One of the most noteworthy aspects of Griffey’s career was that nobody accused him of PED use. He is one of a few players from his era who achieved great things without using steroids. This is remarkable because he played during the most infamous era in the sport’s history (via The Athletic).