Luis Gonzalez was a free agent for only hours Saturday before San Francisco and Texas came calling, major league sources confirmed Sunday. Gonzalez, 38, hit .271 with 15 home runs and 52 doubles last year and also has been linked to Detroit and Houston in published reports. Although San Francisco?s conversation was characterized as ?general,? the Giants? interest is the most intriguing and could indicate a fundamental shift in organizational thinking under new manager Bruce Bochy.