Knobler On Padres, Urrutia, Cardinals, Stanton

Here's the latest from CBS Sports' Danny Knobler:

• The Padres, who are now 42-54, have decided they're sellers, Knobler writes. They will listen to offers for Chase Headley (who is eligible for free agency after next season), but Knobler suggests they're in no rush to deal him. Instead, they could deal Edinson Volquez and/or bullpen arms like Huston Street. 
• The Orioles have already traded for Scott Feldman, and they might continue to be active on the trade market, but Knobler suggests their biggest addition might come from the promotion of Cuban outfielder Henry Urrutia, who is hitting .367/.406/.467 in his first 15 games at Triple-A Norfolk.
• Knobler confirms that the Cardinals have talked to the Cubs about Matt Garza, and suggests that the two teams' front offices might not find the possibility of trading with one another quite as strange as some fans might. Knobler notes that the last significant deal between the rival squads occurred in 2002, when the Cubs sent Jeff Fassero to St. Louis.
• Elsewhere, Knobler writes that the Marlins may be becoming less inclined to trade Giancarlo Stanton. The Marlins feel that they could improve quickly, and may want to wait to see how Stanton (who is only 23 and is not eligible for free agency until after the 2016 season) and their other top young players perform together. The Marlins will continue to shop relievers and older position players, but youngsters like Jose Fernandez, Jacob Turner and Marcell Ozuna evidently have the Marlins wondering whether they could join Stanton as part of the core of the next good Marlins team.