Click on player to pop-up WARP rating (negative values not displayed).
How did you do that? Could you share the code?
It's one of the Google gadgets.
[...] by Evan Zamir’s use of a treemap to visualize WARP over at The City, I created a treemap to visualize ASPM VORP for the 2012 season-to-date. I used Google Docs and [...]