You’re going to want to read this Fangraphs piece comparing Bryce Harper’s unreal pro start to those of Griffey Junior, A-Rod and others before him:
Despite all the hype, I’m still not sure we’re accurately appreciating just how good this kid really could be. He’s 18 years old, playing in his first professional season at a time when he should be getting ready to graduate from high school, and he’s hitting .396/.472/.712. That’s his line after last night’s 4 for 5 performance – one which included a grand slam, his eighth home run of the season.
He’s eighteen years old. Sure, it’s only 111 at-bats, but he could go into a slump of epic proportions and still match the numbers put up by some of the best age-18 seasons of all time.