As is all over Twitter, and as Matthew has already fanshotted, the Seattle Mariners have sent Michael Saunders back to Tacoma and replaced him with Greg Halman. Greg Halman is not Mike Carp, but if you didn't realize that until you read this blog post, you have bigger things to worry about than the Mariners' outfield depth situation.
Halman is coming up less than a week after returning to the Rainiers from a fractured wrist. He's 9-for-35 on the year with a homer, but more relevantly, he posted an .854 OPS with the Rainiers a season ago before showing up in Seattle in September. The 23-year-old righty will presumably serve as center field depth behind Franklin Gutierrez, and I'd expect him to find his way into a half-decent number of games until or unless Guti feels up to playing every day. His skillset is exactly what you remember it being.
As for Saunders, the word that comes to mind is "finally." Saunders has been overmatched from the beginning and has looked more and more dreadful as we've distanced ourselves from Spring Training. I don't know if he can be fixed or tweaked or whatever he needs in order to have a career, but better to work on him in Tacoma, where he doesn't need to worry about a Major League pennant race, and where he might be able to build some confidence that he's surely long since lost. Defensive work aside, with the Mariners he wasn't doing any good for himself, and he wasn't doing any good for the team. The writing has been on the wall for weeks.
In the immediate, this move isn't likely to change very much. But Halman should be at least a tiny bit better than Saunders in the bigs, and now Saunders can try to get himself on track in a lower-pressure setting, so I don't see any reason to complain. This is not bad.