According to major-league sources, the Giants were scouting Texas third baseman Hank Blalock, who went on the disabled list with a sore shoulder Tuesday. The Rangers contacted the Giants about Blalock, a 27-year-old with some (but not overwhelming) power. The Rangers covet Giants' pitching, including Jonathan Sanchez. The Giants like Beltre, believing he would thrive in the more fastball-oriented National League, but a source said they have not exchanged names with the Mariners.