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Updated NCAA Plus-Minus (as of 1/8/10)
January 8th, 2010 by Jon Nichols

I have updated college basketball plus-minus numbers today, along with a few helpful improvements. If you’re wondering why the numbers are so much different than last time, be sure to check the first bullet:

• The biggest and most significant change is the way in which plus-minus is now calculated.  Previously, I compared the team’s production with the given player on the court to the team’s production as a whole.  Now, I’m comparing the team’s production with the given player on the court, as before, to the team’s production with the player OFF the court.  For example, John Wall’s plus-minus is the difference between Kentucky’s differential when he’s playing and Kentucky’s differential when he’s not playing.  This puts my plus-minus in the more traditional on/off form that most people are used to seeing.
• Every team and player in Division I is now available.
• Along with each player’s net overall, offensive, and defensive plus-minuses, the spreadsheet now includes the player’s total plus-minus and the estimated amount of possessions they were on the court for.   The plus-minus total is simply the total amount that player’s team outscored or was outscored by their opponent while the player was in the game.

The numbers are embedded in the table below.  To download the spreadsheet as an Excel document or view the online spreadsheet in full-screen mode, click the arrow in the top left.  You can also use the filter to sort by team.  Enjoy!

4 Responses
Zipsfan writes:
January 11th, 2010 at 2:26 pm

Hi Jon,

Thanks for the Plus / Minus stats for college hoops. I’ve been looking for these for a few years, and other than doing a few games manually here and there, haven’t seen them regularly.

I have a question as to your total plus minus as it relates to Net Overall. You state that Total Plus / Minus is the actual sum of the teams performance while that player has been on the floor thus far. If that’s the case, shouldn’t the Net Overall * Games Played = Total Plus / Minus?? Or is there some 40 minute calculation in the Net Overall. I interpreted your post to indicate you had dropped the (per 40) aspect of your calculations.

Thanks & keep up the good work!

Zips Fan.

Jon Nichols writes:
January 11th, 2010 at 5:50 pm

Total Plus/Minus is not “net.” Therefore, it is simply the amount the team outscored their opponent over the whole season while that player was in the game. It is not on/off. Net overall compares a team’s production with the player on court vs their production with the player off the court. Net overall is on/off.

Zipsfan writes:
January 12th, 2010 at 8:55 am

Jon,

Thanks for the clarification. To the Total is “ON” only .. similar to the popcornmachine.net way of doing it. Only what happens when the player is on the floor matters.

Again, great site & resource .. I’ll be linking to it frequently, I’m sure.

Go Zips!

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