Ty France gets traded
Ty France has been at the center of trade discussions all offseason, and even at the trade deadline. He could fetch the Mariners a solid outfielder (the Mariners would most likely have to add prospects), or maybe even a back-end starter. He is coming off a rough year and shouldn't be guaranteed to be the opening day first baseman. I think a France trade makes even more sense after the supposed trade of acquiring Luke Raley.
If France and prospects can net you an outfielder like Max Kepler or Anthony Santander, I think that is something that you certainly have to entertain. The offensive output would be fairly equal, but it gives you more certainty and possibly even higher upside. You can move Raley to first base and all of the money doesn't really increase all that much. You would have an outfield of Haniger, Julio, Raley, Canzone and still have a lot of money to work with.