The Plus/Minus system is simple: A player gets credit (a "plus" number) if he makes a play that at least one other player at his position missed during the season, and he loses credit (a "minus" number) if he misses a play that at least one player made. The size of the credit is directly related to how often players make the play. Each play is looked at individually, and a score is given for each play. Sum up all the plays for each player at his position and you get his total plus/minus for the season. A total plus/minus score near zero means the player is average. A score above zero is above average and a negative score is below average.

Plus/Minus is only one element of our Defensive Runs Saved system. Here's an overview of the eight methodologies that comprise Defensive Runs Saved:

1) Plus/Minus Runs Saved – measures range

2) OF Arm Runs Saved – measure outfielder arms

3) GDP Runs Saved – measures double play ability

4) Bunt Runs Saved – measures ability to field bunts

5) Good Plays and Misplays Runs Saved – measures contributions on miscellaneous plays which prevented or allowed a batter or baserunner advancement

6) Catcher Stolen Base Runs Saved – measures the catcher’s ability to control the running game

7) Pitcher Stolen Base Runs Saved – measures the pitcher’s ability to control the running game

8) Adjusted Earned Runs Saved – measures the catcher’s handling of pitchers


To read detailed explanations of each methodology, hover over Plus/Minus on the top navigation menu.