The San Francisco Giants led the Texas Rangers 2-0 in route to their World Series Championship in 2010. 41 out of the 52 teams who have led 2-0 have gone on to win the series.
The first time that a team rallied from such a deficit was in 1921 when the New York Giants beat the New York Yankees. It did not happen again until 1955 where the Yankees were beated by the Brooklyn Dodgers. The Dodgers would take a 2-0 lead in the 1956 series, only to have the Yankees come back to win that series. The Yankees did the same in 1958 to beat the Milwaukee Braves.
It only happened once in the 1960s, when the Los Angeles Dodgers came back to beat the Minnesota Twins. Twice in the 1970s; when the Pittsburgh Pirates beat the Orioles in 1971 and 1978 when the Yankees beat the Dodgers saw a team rally from a 2-0 hole. The 1980s saw it happen three times; the Dodgers beating the Yankees in 1981, Kansas City beating St Louis in 1985 and of course, the Mets beating the Red Sox in 1986. Ironically, both deciding game 7s of 1985 and 1986 happened on this date (10/27) in baseball history.
Based on the amount of times teams have rallied from a 2-0 deficit, there is a little over a 21% chance the Tigers can come back. The odds are less than that, though, that they actually will. Since no team has ever overcome a 3-0 margin in the history of MLB, the Tigers would prefer to take game three and go from there. They have played much better at home, an over .600 winning percentage, while playing under .500 on the road. Maybe some home cooking is all they need.