What’s a Player Worth?

Spurred on by discussion in my fantasy baseball league (where many of my baseball musings are born) about whether or not the Braves got a good deal on Josh Donaldson with a $23 million 1-year contract, I thought to myself, there must be a quick-and-dirty quantitative way to spit out a number for how much a player is worth based on his recent performance and age. (more…)