The MLB season usually starts from the beginning of April.
After the regular season. Hence the word post.
April 5th 2010
The 1880 White Sox and the 1935 with a shocking 21 wins in a row to start their season respectively.
As of the start of the 2008 season there is one Canadian team in MLB, the Toronto Blue Jays.
21 consecutive losses by the 1988 Baltimore Orioles.