The worst player who played significant minutes in 2013-14 was Dennis Schroder of Atlanta, with a very poor -8.3 rating. About the Authors, aaron Barzilai played on the varsity basketball team at MIT as an undergraduate before earning his. DerivationThe regression for BPM was constructed upon the individual player advanced statistics (such as True Shooting Percentage (TS) and Assist Percentage (AST with a linear team adjustment constant added so that the player ratings sum to the observed team rating. (field goal attempts). (minutes played) * (player age) -. There are limitations on all box score stats if the box score doesn't measure a particular contribution, a box-score-based metric can only approximate that contribution. The most significant change is to correct the weighting scheme used in the regression. Add actual playoff efficiency differential to the calculated strength of schedule to get the adjusted team efficiency differential used in the BPM calculation. Plus - minus - zero.de reputation scorecard. Is, plus - minus - zero legit and safe? Some point guards, in particular, may be underrated on offense Steve Nash and Mike Conley, for instance. Plus - minus - zero.de review. Only players who had a final weight of over 250 were used, leading to a total of 961 players being included in the regression. However, the team totals include team turnovers (i.e., turnovers that are not attributed to an individual player). (Tom Tango is a baseball sabermetrics expert, and one of the originators of the replacement level framework and the Wins Above Replacement methodology common now in baseball.) The conclusion was to establish -2.0 as replacement level for the NBA, measured in terms of points above.