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 Schedule & Results  Player Efficiency |
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Player Efficiency Ratings . . .The Player Efficiency Rating, used to order the listing of player names on the Front Page (and posted in the left and right columns of the Season Summary page), is a number that rates the net contribution a player makes to the game (generally, the good things minus the bad things). There are exceedingly difficult methods (see the John Hollinger method), and there are much easier methods (see the NBA's EFF method). Not surprisingly, I use the easy one.The easy formula for an efficiency rating in a game is as follows: Points + Rebounds + Assists + Blocks + Steals - Missed Field Goals - Missed Free Throws - Turnovers For purposes of this web site, a fractional term is added: Minutes Played/Minutes Available (rounded to one decimal place). This is insignificant in the rating value (the term is usually less than 1) but is added to break ties. As an example, say a player had 21 points, 8 rebounds, 2 assists, no blocks, 1 steal, 8 missed field goal attempts, 2 missed free throw attempts, and no turnovers. He played 31 of the 40 available minutes (0.775 of the game). Putting those numbers in the above equation, and adding the "minutes" factor, produces a 22.8 Efficiency Rating. A season or career Efficiency Rating can be derived by using total points, rebounds, assists, etc., and dividing the cumulative result by the number of games played in a season or a career. A link to the current season player efficiency ratings for each Forester appears in the right column of the Season Summary page. Unlike some other measures of efficiency on this web site (as in team rebounding and scoring), the player efficiency rating is not a percentage, except for the last digit which, in the above example, shows he played about 80% of the game). This should probably be called a Contribution Rating; it doesn't really measure player efficiency. Good ratings are generally in the 20's; excellent ratings are in the 30's. There is no upper (or lower) limit. If a player had 50 points and 50 rebounds and didn't miss a shot, he could earn an Efficiency Rating of over 100. There can also be (and often are) negative results when more bad things than good things happen. |
Paul Harrington, Fort Wayne, IN