Longtime readers might remember that I took up the +/- project back in 2008. There are a lot of caveats that come with this form of evaluation, but I think when it's done right--that is when done with a with-or-without-you approach, adjusted for tempo, with player pairs and full five-man lineup data--it can be pretty enlightening. I'm not all the way there yet. I'm still at the with-or-without-you level, which sheds some light but is obscured quite a bit by the impact of a given player's teammates.
Here is what I have so far. (Wisconsin game not included since they didn't bother to include substitution data in the box score.) The key columns are in bold--the team's offensive and defensive efficiency while a given player was on or off the court. It's way too early in the season and the process for concrete conclusions, but this at least offers a glimpse at how guys are helping or hurting the team.