Dave Studeman at the The Hardball Times last week detailed a new stat called Win Shares Above Bench, or Baseline – aka “WSAB.”
This is a refined approach to Win Shares, in which each player’s total Win Shares are compared to the Win Shares an average bench player would have received, given that player’s time at bat, on the mound or in the field.
When you look at the 2006 Yankees, in terms of WSAB, you find this:
Notice what happens when you use WSAB rather than total Win Shares.
The distance in the totals between A-Rod and Jeter stay the same. But, Posada and Giambi move closer to Jeter – instead of being 9 or 10 behind (in WS) they’re now 6 behind (in WSAB). And, Mike Mussina moves from 18 behind (in WS) to 10 behind (in WSAB).
This does not mean that Derek Jeter was not very valuable to the Yankees in 2006. It’s just interesting that WSAB allows guys like Posada, Giambi, and Mussina to close the gap from Jeter whereas it does not for Alex Rodriguez.