Question: Who has the most home runs in a single season in major league baseball?
Disambiguated questions and answers: question: Who has the most home runs in a single season in all of major league baseball?
Who has the most home runs in a single season for the national league in major league baseball?
Who has the most home runs in a single season for the american league in major league baseball?
answer: Barry Bonds
Bonds
Barry Bonds
Bonds
Maris
Roger Maris
Natural Questions answer: Barry Bonds (from the Wikipedia article "List of Major League Baseball progressive single-season home run leaders")