Um... Huh?

From NHL.com:

The Buffalo Sabres acquired veteran defenseman Craig Rivet from the San Jose Sharks on Friday.

The Sharks sent the 33-year-old veteran and a seventh-round selection in the 2010 Entry Draft to the Sabres in exchange for second-round selections in the 2009 and 2010 Drafts.

I'm not understanding this one, but I'll hold off until Doug Wilson explains the deal.