May 17 is an odd day in Cubs history.
For starters, the longest game in franchise history occurred on May 17, 1927 when the Cubs beat the Boston Red Sox 4-3 in 22 innings.
Exactly 50 years later (1977), the Cubs hit seven homers en route to a 23-6 victory over the San Diego Padres as Larry Biitner (2), Dave Rosello, Gene Clines, Jerry Morales, Steve Ontiveros and Bobby Murcer all went deep (h/t Chris Kamka for the info).
But May 17 is also home to what may have been the craziest game the Cubs franchise has ever taken part in (yes, including Game 7 of the 2016 World Series; that was the greatest game every played).