Baseball Analysts have a nice little write-up (and graph) on how the M's outfield defense has performed so far over the first four games of the season. Obviously, small sample size caveats apply.
There have been 40 balls in play to Seattle's outfield so far and the average outfield makes 21.75 outs. The Mariners made 25 outs. They are 3.25 outs above average just four games into the season (how many over Raul?).
I'm excited to see how much coverage and recognition the M's outfield defense has been getting early in the season. And, holy shit, I can't wait for Ichiro to return and we can see this outfield at full strength.