Always interesting to see arbitrary cut-offs in bkb history such as beginning this list in 1980. Why 1980 -- because the 3-pt-shot was introduced that year? Well, the HR was also alive & well in 1974, when Erving's Nets won it all as the youngest champions ever, beating out Walton's Wonder Blazers by a fraction. Why not start bkb history in the Erving Era, or w/ the post-Russell pros?
The "metric" of weighting mpg by age discounts the team-factor of a cohesive unit utilizing experience on the bench when necessary. Most of the clubs on the "young list" in the article are remembered for fizzling out, unfulfilled promise, &/or never getting over the hump. The only one listed that did soon after cop a title, the Lakers, achieved it by bringing in grizzled role players like Ron Harper, AC Green, Brian Shaw, & John Salley to balance Phil Jackson's need for experience, the more greybearded seemingly the better, followed by Ho Grant & Mitch Richmond at the end of their careers.