I'm certainly not saying that stat doesn't have any value, because honestly I have no idea what it is, but Wood is #32 (just behind our old friend Ohman). Certainly you would have to agree he's a top 10, if not top 5, reliever in the game. It's expected wins over a replacement level pitcher. However, it goes a step further by adjusting for quality of hitters faced. That way you can't just come in and face garbage players each game and show off a .80 WHIP -- it's showing how good the guys you faced were and how much better you were than a replacement pitcher. So basically, if Wood were to have faced tougher hitters up to this point, he'd have a higher WXRL. I see the value in that, but it's not like he has any control over who he faces. When he's been on his game this year (which has been more times than not), then I don't anybody who steps into the batters box has much of a chance.