Yusmeiro Petit has been nearly perfect since the Giants brought him to San Francisco in late August. After losing his first game, Petit still feels he learned something.San Francisco Giants pitcher Yusmeiro Petit (52) throws against the San Diego Padres during during the first inning of a baseball game in San Francisco, Saturday, Sept. 28, 2103.San Francisco Giants pitcher Yusmeiro Petit (52) throws against the San Diego Padres during the first inning of a baseball game on Saturday, Sept. 28, 2103, in San Francisco.