W vs xW

[Lion]

Using Playerlink this year, it appears that W are always equal to xW. For example, Holmes of the Mets has both 7 wins and 7 xW. That can't be right, right? Looking at other pitchers, this also seems to be the case. If it isn't an error, it would seem that in future years, the xW column could be eliminated.

My apologies if this has already been asked and answered elsewhere in Forums.

[RAY@HQ]

I've been meaning to dive deeper into the xW calc. I know they were not equal in the pre-season projections, but I've been wanting to pull that calc apart for a while.