The last time it happened was 2016 when arch-rival Chicago Cubs won at Cleveland to break their 108 year drought in winning the fall classic.
Our own St. Louis Cardinals is one of two teams to do it twice (other was NYY ).
Even we oldtimeers on CT were not around (see ** below ) for the two Cardinals comebacks.
The last one was in 1934 The 'Gashouse Gang' who beat the Tigers in Detroit and prior to that 1926 when the Cardinals beat the Yankees in New York .
* * The Gashouse Gang win was 91 years ago . So only those nearly 100 years old were around when that happened. Not even Old Red was around for that one .