***The following stats are derived from baseball-reference, not Fangraphs***

Pastornicky is on pace to cost the Braves 56 runs over the course of the season in his defense alone. He racked up another last night when he backed up on what should have been a routine ground ball and Stubbs beat it out. Stubbs was later knocked in by Brandon Phillips on a 2-run HR, Stubbs run being the difference in a 4-3 game.

The 56 runs comes from DRS (or the +/-system according to the fielding bible). For those who are unaware of DRS, here's the breakdown to how it's caluclated...

"In the Plus/Minus system, the computer totals all groundballs hit by right handed batters to Vector 206 (Vector 206 is a line extending from home plate towards the hole between the normal shortstop and third base positions, 19 degrees off the third base foul line) with an average velocity between 65 and 75 miles per hour and determines that these types of batted balls are converted into outs by the shortstop only 23 percent of the time. Therefore, if the shortstop converts a slowly hit ball on Vector 206 into an out, that’s a heck of a play, and it scores at +.77. The credit for the play made, 1.00, minus the expectation that it should be made, which is 0.23. If the play isn’t made, it’s -.23."

Some of the worst defensive SS of our time have been Hanley Ramirez, Derek Jeter, and Miguel Tejada (the older years), but none treaded where Pastornicky is headed.

Here are the worst years for the mentioned Shortstops:

Jeter: -27 drs

Ramirez: -28 drs

Tejada: -15 drs

Do you all agree with the numbers DRS has for Pastornicky? I do, but I'll leave my opinion for the thread.

http://fieldingbible.com/Fielding-Bible-FAQ.asp