The 1912 New York Giants season was the franchise's 30th season. It involved the Giants winning the National League pennant. They were beaten by the Boston Red Sox in the World Series. Fred Snodgrass took most of the blame, as he dropped a fly ball in the deciding contest.

The 1912 Boston Red Sox season was the 12th season in the franchise's Major League Baseball history. This was the first year that the team played its home games at Fenway Park. The Red Sox finished first in the American League (AL) with a record of 105 wins and 47 losses. The team set the franchise record for highest winning percentage (.691) in a season, which still stands; tied the franchise record for fewest losses in a season, originally set by the 1903 team; and set a franchise record for most wins, which was not surpassed until the 2018 club.