Padres closer Heath Bell appears to be keeping tabs on his own market, telling Bill Shaikin of the L.A. Times he views the Angels, Yankees, Cardinals, Rangers, and Phillies as potential suitors (Twitter link).
Bell discussed the trade possibility at length with MLB.com's Matthew Leach and other reporters today at the All-Star game media session, saying he's willing to set up for the rest of the year if a team acquires him for that role. Of course, he doesn't really have any say in the matter; if a team wants him to play shortstop he'll have to do that to collect his paycheck. Bell does not seem to have a league preference. As you might expect, Bell will want a closing job when he signs a contract as a free agent.
An NL executive spoke to Tom Krasovic about Bell's trade value, wondering if Padres setup man Mike Adams is valued more. As far as fantasy baseball trade value, Dan Mennella at CloserNews wonders if it's time to try flipping Bell.