Hey CBZ, you forgot Antonio Gates. May not be an official WR, but he's their leading receiver.
And McCardell is nothing to sneeze at. He's a very good WR. All the intangibles, but without the speed. Hands like Glenn, but tough like Keyshawn, IMO.
Looking at the size of their WR corp, they've got some big WRs. All are 6'+ with Osgood and Jackson the rookie the tallest at 6'5"
According to their depth chart, the top 3 are McCardell, Osgood, and Jackson. But I think that's because Caldwell is coming off an injury from last season. Before the injury, I think he was their #2.
They may not have a big name WR corp, but I think they can produce and will be a challenge to our secondary.