Originally Posted by MoneyInTheBank
Look at Willy Taveras' defensive stats before, during and after Colorado. He is considered a GREAT defensive CFer. He was dramatically worse in Colorado than Houston or Cincy.
Defensive metrics are measured by dividing the field into zones and seeing how many balls hit in the zone are caught. Bottom line, huge park, less balls any CF can get to. Again, if you are going to knock his hitting for playing in a huge park, you can't knock his fielding for playing in that same park.
By no means do I think he's a great CFer, but he's more than adequate
The way I understand UZR ratings, this is not entirely true. They do look at the percentage of balls hit into a zone by a player. But that number is then compared with the percentage of balls that all outfielders catch in that particular zone.
A quick example with entirely made up numbers for illustration purposes. Say in GAPB Drew Stubbs catches 85% of the balls in his zone. However, of all the balls hit into that zone, 90% are caught. That makes Stubbs a below average fielder. Next, say Fowler only catches 80% of the balls in his bigger- zone in Colorado. But, at the same time, of all the ball hit into that zone only 75% are caught. That would make Fowler an above-average fielder. By doing it this way the size of each zone is irrelevant. At least that is how I understand the workings of UZR. I could be wrong.