Bell, if available, would undoubtedly be the best closer or relief pitcher on the trade market. The Padres would be smart to move him since his trade value will be off the charts. They could get two or three mid- to high-level prospects in return for Bell.
The Padres closer has emerged as one of the best closers in the game, if not the best, after Trevor Hoffman left San Diego a few years back.
Bell is 1-0 with a 1.29 ERA and has saved eight games in nine opportunities.
There are plenty of teams that should be after Bell, but these stick out as the primary ones. They are also rumored to be interested.
Note: The inspiration for this article and its rankings comes from this mlbtraderumors.com article, entitled "Trade Candidate: Heath Bell." The summaries listed here are entirely original and from the Bleacher Report author's perspective.