The rich get richer. So it goes in life; so it (often) goes in baseball.
Take the Houston Astros. They're the defending champions of MLB and still cleaning the champagne and confetti off their uniforms. They boast a roster laden with rising stars.
They've got diminutive second baseman and reigning American League MVP Jose Altuve. They've got Carlos Correa, one of the leading members of baseball's burgeoning shortstop revolution. They've got center fielder George Springer, third baseman Alex Bregman, left fielder Marwin Gonzalez, first baseman Yuli Gurriel and on and on.
Add it up, and you're looking at the squad that paced MLB in runs, average and OPS in 2017.