 a b Developed by the organization that awards The Fielding Bible, defensive runs saved (DRS) measures a player's total defensive plays made in terms of numbers of runs above or below what the average player at that position made. A calculation system computes the number of plays made league-wide at each position and a plus-minus total rating for each player compared to a league average player. For example, if Heyward made a play that only 20 % of right fielders would make, he was credited with .8 points – or, 1 point minus .20. If he failed to make a play that 75 % of right fielders made, then .75 points was subtracted from his score.
