I don't think there is any way the Mariners include Jones in the deal for Willis.
My A's could be big time sellers. If they don't come out and win 12 out of 15 or something like that after the break Billy Beane will start unloading looking towards next year.
Kurt Suzuki is already taking at bats away from J. Kendall and Kendall is a goner after the season because he's a free agent. The A's also have Landon Powell on his way up. A team with no depth or a team wanting another catcher (he's been hitting well over the last few weeks) could look at him as a stop gap measure. I think if Beane got offered anything for him he'd bite.
MikeO mentioned Dan Johnson at the beginning and I can see that as a sure bet almost. Daric Barton is the future at first base, he's hitting over .320 in AAA. I think Beane wants a long look at him at the end of the year. Johnsonm has no where to go. Barton is the future and if he is not quite ready Swisher can play first base.
A couple of other A's names that could come up if they struggle after the break are Shannon Stewart, Esteban Loaizia (he'll be back in the rotation in 2 weeks), Joe Kennedy (a spot starter and a bullpen lefty), and Alan Embree.
The A's are thin at the top of their prospect list. After Barton, Suzuki and Meyer it drops off big time until you get to single A. After graduating guys like Swisher, Blanton, Street, Buck and with Barton, Suzuki and Meyer on the rise it is expected to have a drop off for a year or two.
Billy Beane has not made a "splashy" move for a couple of years, I think he'll do whatever he can this year to add some mid prospects to the organization.