So they said a couple of times during last night's game that the Rockies have the best defense in the history of baseball...what is that based on?

They Rockies set a MLB Record with a .98925 fielding percentage during the 07 season. That means they play top notch defence with rarely any errors!

Fielding percentage I would assume. It does help when the opposition doesn't hit many hard balls at you. Just wait till they play the Indians or Red Sox...that mantra will subside.

it is based on feilding percentages and double plays

they have the lowest errors in baseball too,what like 67 last time i checked,i think.