13 runs is the record for a clinching game. It's been done four times, by the A's over the Giants in 1911, the Yankees over the Cubs in 1932, the Yankees over the Giants in 1936, and the f***ing Yankees again over the Reds in 1961. The most runs scored in a shutout in a clinching game is 11, by the Cardinals over the Tigers in 1934 and the Royals over the Cardinals in 1985. Looking through all of the clinching games, there were a few 9 and 10 run scorers, a few more 7 and 8, but the numbers I saw the most were 2 and 3. I'd say about 75% of World-series clinching games were won with less than 5 runs.