From Dejan Kovacevic of the Pittsburgh Post-Gazette:
The Pirates and San Francisco have had trade talks regarding second baseman Freddy Sanchez and, to a lesser extent, first baseman Adam LaRoche, each of whom can be a free agent after this season. The Giants have had a scout following Sanchez, a source confirmed yesterday, and their interest in LaRoche goes back several months. Their preference at first base, though, is for a right-handed bat.
Sanchez sports a .316/.355/.477 line, a huge improvement on the .224/.280/.276 aggregate performance from Giants second basemen (primarily the demoted Emmanuel Burriss, though Juan Uribe has snagged recent starts). The Giants have a 1.5 game lead for the Wild Card, but their .705 team OPS ranks second-to-last in the NL. Sanchez's contractual situation will be a factor in the trade talks; an $8.5MM option for 2010 appears likely to vest. Charlie Manuel's All-Star selections will affect Sanchez's contract – if Sanchez makes the team the option vests with 600 plate appearances rather than 635. It figures to be between Sanchez and Zach Duke for the Bucs' representative.
Kovacevic adds that the Pirates have discussed Jack Wilson, John Grabow, and Matt Capps with teams, noting that those talks "vary in their intensity." In another article, Kovacevic digs deeper into the Grabow/Wilson/Sanchez situations. He believes the Pirates will seek shortstops and left-handed relievers in trades. I'm guessing the Pirates would find Jonathan Sanchez desirable (he's currently serving as the second lefty in the Giants' pen).