A couple of musings about some potential moves.
I think Hayes to Seattle actually makes a lot of sense on paper. The Mariners are also a pretty cheap organization and I figure they would view Hayes' contract very favorably, since he's both pretty cheap and cost controlled. It would largely depend on whether they think they can get more out of his bat, but the Mariners are also not getting good value out of their infielders offensively. The Mariners have a good bullpen, so I'd be shooting for Hayes for a bullpen arm and see if they can get that done.
I've mentioned wanting to look at a SS, but looking through the FA list it's pretty barren. DeJong is an interesting target for me because he's a power hitting SS that actually has good SS defense, but his issue is that he's downright atrocious at making contact. I'd probably bet on him putting up 15-20 HRs but still only having about an 85 OPS+, but 15-20 HRs with good SS defense seems worth the addition. Especially because it moves IKF to 3B, where his defense is actually plus caliber. DeJong at SS and IKF at 3B with Yorke and Triolo getting regular reps seems like something I can get behind.
The thing that sucks about this FA class is that there aren't a lot of good 1B or corner OF options that I actually like and are in the Pirates price range. I'd like to add 2 lefty bats, either 2 OFers and move Reynolds to 1B or 1 OF and 1 1B and keep Reynolds in the OF until Yorke is fully ready. Kepler is one guy I want and I really hope he's one of the lefty bats they add, but the list gets pretty grim after that. I think signing Verdugo to a 1 year deal and Kepler to a multi-year deal is the best option there, that would have Reynolds moving to 1B and Yorke taking Verdugo's spot in LF at some point. But I'm super lukewarm on that idea because I'm not a huge fan of Verdugo.
That said, if they give both Kepler and Verdugo a 3 year, $30 million deal to lock up their corner OFers for the next 3 years, I wouldn't exactly complain.