Jon Heyman of Sports Illustrated lists possible position players that could be moved by the July 31 trade deadline. Heyman says there’s plenty of quantity, but not much quality. Says one NL GM, “There are a lot of players available but they’re mostly complementary pieces.” Here are a few highlights:

Prince Fielder, Milwaukee Brewers: Odds are he stays with the Brewers. “I’d be surprised if they move him,” said one GM.

Jayson Werth, Philadelphia Phillies: The Giants, Rays, Yankees and Red Sox would have varying degrees of interest in the five-tool right fielder.

David DeJesus, Kansas City Royals: A competing GM is skeptical about whether the Royals will actually deal him. The Red Sox and Giants are candidates for DeJesus.

Luke Scott, Baltimore Orioles: He’s been the Orioles best hitter lately. He could help a lot of contenders if he’s moved.

Dan Uggla, Florida Marlins: One GM said he still envisions Florida keeping him.

John Buck, Toronto Blue Jays: He should bring back a haul, if available. He’ll be a long shot to go.

Kelly Johnson, Arizona Diamondbacks: The price tag will be high since he’s under contractual control for another year and after a very good 2010.