http://joeposnanski.blogspot.com/201...r-you-get.html

There is a lot in the article, but here is the real good stuff:

Winning percentages when team leads by three runs going into the ninth inning:

1960s: .974
1970s: .977
1980s: .975
1990s: .963
2000s: .976

Winning percentages when team leads by two runs going into the ninth inning:

1960s: .930
1970s: .925
1980s: .941
1990s: .936
2000s: .931

WInning percentages when team leads by one run going into the ninth inning:

1960s: .844
1970s: .850
1980s: .852
1990s: .846
2000s: .848