On June 18, 1953, in a contest versus the Detroit Tigers at Fenway Park, the Boston Red Sox scored 17 runs on 14 hits in the bottom of the 7th inning. The offensive explosion set a modern day record for most runs scored by one team in an inning, it's a record that still stands today. George Stephens picked up 3 hits and 3 ribbies in the frame and Dick Gernart hit the only home run of the monster inning. It took three pitchers and 47 minutes to complete the bottom of the 7th and by the time it was wrapped up the Sox had a 22-3 advantage, they tacked on another run in the eighth. The 23-3 beatdown was witnessed by 3,108 fans, those that sat in the stands that day witnessed something that is almost hard to believe. The all time record for most runs scored by one team in an inning is 18, it was set by the Cap Anson's Chicago White Stockings in 1883, they beat the Detroit Wolverines 26-6.
Here's the crazy box score, if you scroll down a bit you can check out the play by play of that inning: http://www.baseball-reference.com/boxes/BOS/BOS195306180.shtml
The 18 run inning for Chicago is remembered in this newspaper archive from 1932: http://news.google.com/newspapers?nid=1499&dat=19320614&id=q7FQAAAAIBAJ&sjid=JyIEAAAAIBAJ&pg=3740,1554365