With his home run Tuesday, Nationals outfielder Bryce Harper passed Ken Griffey Jr. for the most home runs before age-21.
With 39 home runs already, Harper only trails Mel Ott and Tony Conigliaro. Harper will turn 21 in October, but would have to hit 17 home runs to tie Conigliaro, which doesn't seem likely. Still, passing Griffey in any category is a pretty high honor for a 20-year-old.
Harper is hitting .271/.365/.526 in 266 at-bats.