These new peaks in performance aren’t just the product of better technology. They’re a manifestation of a new philosophy of human potential. Increasingly, teams and players are adopting a growth mindset that rejects long-held beliefs about innate physical talent. One of the only innate qualities may be how hard players are willing to work. Scouts have historically graded players based on five physical tools, but in an era of optimization, a player’s approach to practice is a once-unsung sixth tool that affects the other five.

