6. Chicago Cubs
Despite winning last year’s World Series, the Cubs still qualify as young.
Catcher Willson Contreras slashed .282/.357/.488 last season and is only 24.
We’re also — hopefully — getting our first full year of outfielder Kyle Schwarber, who had an .842 OPS in 2015 and hit .412 in last year’s World Series.
Second baseman Javier Baez is 24 and put up 3.4 WAR last season. Shortstop Addison Russell is 23 and coming off a 4.3-win season. Even reigning NL MVP, third baseman Kris Bryant is only 25.
The Cubs are already the best team in baseball. The age of their core players only makes them more terrifying in the years to come.