Winning pitcher Tom Wilhelmsen, who tossed two scoreless innings in relief of Felix Hernandez, was so taken by the fans he saw at his team's first exhibition game against the Hanshin Tigers that he decided to join them. When Hanshin played the A's on Monday, Wilhelmsen went out to the right field bleachers to join the Tigers' supporters...He tried to sing along with them in Japanese when the Tigers were hitting but had trouble figuring out the words."I couldn't,'' he said. "I was trying to but they have a different song for everything and every different player.'' None of the fans, he said, appeared to know who he was. He figures they thought he was some energetic American tourist.