Teams without winning records making the World Series starting in 2010: Red Sox 2018 - 5-5 record (108 wins overall) Mets 2015 - 5-5 record (90 wins overall) Giants 2014 - 4-6 record (88 wins overall) Red Sox 2013 - 5-5 record (97 wins overall) Giants 2012 - 5-5 record (94 wins overall) I went off the last ten games because that just seems like a good gauge on how you went into the postseason. Mind you I think yesterday was the first game in our last 10 games...so this script has barely begun to be written for 2021. I was kind of surprised there weren't more. Still, these teams make up 23% of World Series participants. It is notable that only one team since 2010 managed a losing record in their last 10 games and then went on to make the World Series. Additionally, I think the longest losing streak to end the year was 3 games. Now if you did this exercise for how the hottest teams do, yeah, you probably find some more success. But is that because they were hot or because they were just generally that great? I am guessing the later would be more why they made a run. Of course this only looks at the team making the World Series. If you expanded this to the NLCS I am sure there would be a lot more teams. If teams went flat into October I am guessing most expect them to get stomped right out of the gate and not even make the NLCS. That seems to be the big concern around here.