Fields doesn't suck, and $1.5 isn't awful if you need a COF, but he's not the run producer you can often get in RF. Depends what you have elsewhere.
Starr would be a decent bench utility guy... except at SS and CF. Keep him at the min. ($325k-ish)
Butera is worth keeping at any price.
Payne is purely a depth, bench guy. OK at the min.
York and Stanley are good defensively for their positions, relatively cheap, and are fine (with semi-playable bats) if they are in the bottom of your lineup and you don't have other options.