Ridiculous to even put Griffey in the same class as Bonds. Bonds was better throughout his entire career.
Wrong. Griffey had the better career through their age 30 seasons. Most of his advantage came from his two year headstart, but even without that they were remarkably similar through age 30. After that Bonds is clearly better.
http://www.fangraphs.com/graphsw.aspx?play...&playerid5=
Look at the second and third graphs to see their similarities by age. Of course Bonds late career ridiculousness destroys the total career comparison.
Remarkably similar? By age 25 Bonds starts to pull away and never really looks back. Griffey couldnt stay healthy and his batting eye wasnt in the same class. And the bulk of the early edge Griffey enjoys is from defensive and positional value. UZR has enough uncertainty and variability to call into question how much of any additional value Griffey posted in their early years.
But defensive and positional value is real value. Griffey was the better defender and played a more important position. And the variability in UZR is somewhat muted over a decent length of time, not to mention any variability applies just as much to Bonds as it does Griffey. UZR is every bit as likely to over-call Bonds skills as it is Griffey.I agree that Bonds was a better hitter, but he was NOT in a different class as a player. There is a case to be made for each.
I forget how exactly they compile the historic WAR numbers, but they didn't start UZR before 2002 or so, so no idea what defensive metric they're using. My point about the defensive value is that even the best metrics right now are no where near as accurate or reliable as the offensive metrics, and prior iterations were even less accurate. They're light years better than fielding percentage and assists, but still highly imperfect. Even ignoring the issues with evaluating defensive value, per historic WAR Bonds was significantly better at age 25 and every year 28 and older. They were roughly equal at ages 22, 24 and 27. Griffey was better ages 21, 23 and 26. Age 21, Bonds was a rookie and only played in 116 games. Its pretty simple, by age 24 Bonds was the better player, though Griffey would go on to have a career year at age 26.