Scheduled to come off the DL, but unlikely will on Sunday.  Hey - remember John Hickey?  Evidently the post-P-I web site is up and running now, and he's posted this in the Seattle Post Globe site.  Looks like he's even scooped Baker on this news:

For one thing, the Mariners aren’t going to get lefty starter Ryan Rowland-Smith back in the rotation come Sunday. That’s the day he is scheduled to come off the disabled list. But that return has been put off by a week, maybe more, with the discovery through an MRI that he has some fluid buildup in his left elbow near the site of his left triceps tendinitis that originally sent him to the disabled list.

(emphasis mine)

Here's the link.

Say what you will about Hickey, but I'm glad to see the Seattle Post Globe site up and running.  I hear there's some good stuff coming around the corner...