Bonus Bold Prediction: Only one of Mitch Haniger or Jorge Polanco is on the team
I think the first part of this goes along with Canzone. Where are you going to put Mitch Haniger? He is one of the worst defenders in baseball, and he isn't even hitting that well. Sure, he had a big hit in the comeback against the White Sox, but he hasn't done much all season. A net zero on offense and a -1.0 dWAR show that he isn't bringing anything, outside of leadership, to the team. It sucks, because I want him to succeed more than any other player on the team... but he just isn't doing it.
First base, DH, and LF are all full. I'd rather see Canzone play everyday as opposed to Haniger, but I don't know if both of them, or either of them, can be on this team and expect to make a run in the playoffs.
The same goes for Jorge Polanco. I don't know what happened to him, but the .595 OPS is awful, especially when you pair it with a 30.9% K rate. With Rojas playing like a top-ten third baseman in baseball and Ryan Bliss trying to make a name for himself at second, is it worth admitting a loss on Polanco and moving on from him? It depends on how Bliss does, but that speed and sneaky power is worth having in the lineup, especially to set the table for the guys at the top.
I don't know how many of these guys are actually going to move. If i were a gambling man (only where legal, of course), I would put my money on the Mariners making a handful of moves before the deadline, and with a few of these guys being involved with it.