Roger Maris and Mickey Mantle had one of the greatest season baseball history. They were both chasing Babe Ruth’s home run record. Roger Maris hit 61 home runs while Mickey Mantle hit 54. Roger Maris won the Most Valuable Player award that year. Even though Roger Maris had more home runs, Mickey Mantle had a slugging percentage of .687 while Roger Maris had a slugging percentage of .620. In the end, Mickey Mantle had a WAR of 10.2. As you can see, both Micke Mantle and Roger Maris had an incredible season in 1961.