Originally Posted by mzh
I don't see what this has to do with math or advanced stats. I'm pretty sure anybody who's ever watched a game of baseball (or any sport for that matter) could tell you that a player probably won't be as good at 35 as he was at 25.
That's being very simplistic. What about rate of decline by position? In football, a running back has a lot less longevity and more rapid decline than say a QB due to the physical abuse they take. Catcher is a more physically demanding position than say first base.
Stats give you the ability to quantify things and compare every possible variable for an informed decision.
Originally Posted by SI1020
Yeah, really. Baseball is still full of people who use sentimental evaluation criteria like leadership, hustle, or even physical appearance as part of their evaluation of a player.
Wouldn't you rather make a decision on a player based on data you can put your finger on rather than a hunch or something that's not able to be rendered mathematically?