Bruce Bochy wants Buster Posey to take a few grounders at first base, but the Giants are not considering a position change. ?He?s a catcher,? Bochy said. ?We?re not trying to convert him.? Bochy reiterated that it?s possible Posey could open as the backup to Bengie Molina and catch two times a week. It?s still far more likely, though, that Posey will begin the season at Triple-A Fresno.