Question: Who has the most wins in a major league baseball season?

context: The following is a listing of all 30 current Major League Baseball (MLB) teams ranked by win-loss record percentage, accurate as of the end of April 10th, 2019. The records do not count wins and losses recorded by a team's playing time in the National Association of Professional Base Ball Players (NAPP). Counting MLB statistics, the New York Yankees have the highest win-loss record percentage, with . The San Diego Padres have the lowest win-loss record percentage, with . The San Francisco Giants and Tampa Bay Rays have recorded the most and least overall wins, with 11,092 and 1,599, respectively. The Chicago Cubs lead the association with the most played games, with 21,395. Conversely, the Rays have played the fewest overall games, with 3,412.
question: Which National League team has the most wins in a single MLB season?|Who has the highest win percentage in a Major League Baseball season?
short_answers: Chicago Cubs
Chicago
Cubs
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question: Who has the highest number of wins in a Major League Baseball season?
short_answers: Cubs and Mariners
Chicago Cubs and Seattle Mariners
Chicago and Seattle
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question: Which American League team has the most wins in a single MLB season?
short_answers: Seattle Mariners

Answer: Seattle Mariners have the most major league baseball wins in a single season for the American League teams, and the Chicago Cubs have the most wins in a single season for the National League teams. So, both the Cubs and Mariners have the highest number of wins in a MLB season.