In today's edition of its 108 Stitches newsletter, the Boston Globe states:
IN GOOD STANDING: In League Championship Series history, 31 of 38 teams (82 percent) that claimed a 3-1 lead in a best-of-seven series have advanced to the World Series. Only three American League teams have ever come back from a 3-1 deficit in the ALCS: The 1986, 2004, and 2007 Red Sox.
This is wrong (and very easily fact-checked, if a newspaper editor felt that doing so was important).
The Royals came back from 1-3 against the Blue Jays in 1985, the first year the ALCS went to a best-of-7.