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In baseball statistics, total bases is the number of bases a player has gained with hits. It is a weighted sum for which the weight value is 1 for a single, 2 for a double, 3 for a triple and 4 for a home run. Only bases attained from hits count toward this total. Reaching base by other means (such as a base on balls) or advancing further after the hit (such as when a subsequent batter gets a hit) does not increase the player's total bases. In box scores and other statistical summaries, total bases is often denoted by the abbreviation TB.
Hank Aaron's 6,856 career total bases make him the all-time MLB record holder. Having spent the majority of his career playing in the National League, he also holds the NL record of 6,591 total bases. Aaron hit for 300 or more total bases in a record 15 different seasons.Ty Cobb's 5,854 total bases constitute the American League record.Albert Pujols is the active leader and 9th all-time, with 5,640 TB through August 11, 2018.
The single season MLB and American League records are held by Babe Ruth, who hit for 457 TB in the 1921 season. The following season saw Rogers Hornsby set the National League record when he hit for 450 total bases.
Shawn Green holds the single game total bases record of 19 TB. Green hit four home runs, a single and a double for the Los Angeles Dodgers against the Milwaukee Brewers on May 23, 2002. The equivalent American League record is held by Josh Hamilton, who hit four home runs and a double (18 TB) for the Texas Rangers in a May 8, 2012, game versus the Baltimore Orioles.
Dustin Pedroia is the only player to have hit for 15 total bases in an interleague game. Pedroia hit three home runs, a single and a double for the Boston Red Sox on June 24, 2010, in a game against the Colorado Rockies at Coors Field.
The 2003 Boston Red Sox hit for 2,832 total bases in the AL; the National League team record for a single season is held by the 2001 Colorado Rockies (2,748 TB). The Red Sox also have the record for most total bases by a team in one game: they hit for 60 TB in a 29–4 victory over the St. Louis Browns on June 8, 1950.
The Boston Red Sox hit for 45 total bases in their 23–7 victory over the Cleveland Indians in Game 4 of the 1999 American League Division Series, a postseason record. The most total bases by a team in a World Series game is 34, by the Atlanta Braves in Game 5 of the 1991 World Series. They beat the Minnesota Twins by a score of 14–5.
Ted Williams hit for a record 10 total bases in the All-Star Game when representing the American League in the 1946 edition. The AL team hit for 29 TB in both the 1954 and 1992 editions of the All-Star Game, while the National League hit for their best ever (25 total bases) in the 1951 game.
Among major league pitchers, Phil Niekro gave up the most total bases in a career (7,473), while Robin Roberts (555 TB allowed in 1956) holds the single season record. The record number of total bases allowed in a single game by one pitcher is 42, by Allan Travers of the Detroit Tigers.