CHICAGO — Every part of this is astonishing: Cubs rookie Kyle Schwarber took an off-balanced swing at a Jacob deGrom pitch and drove it over the wall in right for an opposite-field homer that made him the Cubs’ all-time leader in postseason home runs.

The Cubs’ franchise has existed since the birth of the National League in 1876. Kyle Schwarber made his big-league debut in June.

But we’re in the midst of a different era for baseball and the Cubs both. The Cubs now have guys strong enough to hit a home run on this swing:

Schwarber’s fifth home run tied him with Mets infielder Daniel Murphy for most in the 2015 postseason. The all-time record for home runs is eight, shared by Barry Bonds (2002), Carlos Beltran (2004), and Nelson Cruz (2011).

It’s worth noting, naturally, that teams play most postseason games in 2015 than they did for the bulk of baseball’s history. The LCS round didn’t exist until the divisional era began in 1969, and the LDS round only started in earnest in 1995. Schwarber’s first home run this postseason came in the Wild Card game, which dates back only to 2012.