The record since 1954 (as far back as my box score database goes) is 45 runs, scored in that famous 10-inning, 23-22 game between the Phillies and the Cubs in 1979.
Box: http://www.Baseball-reference.com/boxes/CHN/CHN197905170.shtml
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In the 2011 MLB season, the team that scored 13 or more runs in a game the most was the Boston Red Sox who did it 12 times. They scored 18 runs twice, 16 runs once, 15 runs twice, 14 runs 5 times, and 13 runs twice. The teams that scored exactly 13 runs in a game the most were the Texas Rangers and Toronto Blue Jays who each did it 4 times.
5
me mum
MLB scored 17 runs
11 home runs ***During a "series" not a game. I know the Giants had 14 one year....
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7
The most runs scored in a single game by a single player since 1950 was 7 done by Boston's Spike Owen in 1986.
The most runs scored in a MLB playoff game is 30 (both teams runs combined). Boston (23 runs) won against Cleveland (7 runs) in Game 4 of the 1999 American League (AM) division series. This is also most runs scored by one team in a playoff game (23).
The highest number of runs have been scored by Sachin tendulkar from India in both formats(ODI and Test) of the game.
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