Juan Perez heard an upsetting rumor from a baseball official in the dugout during Game 5 of the World Series then hurried up the steps to the San Francisco Giants' clubhouse to listen to the television broadcast for the news. ''I just overheard behind my back, 'Oscar Taveras has had a car accident. He has died,''' Perez said, getting choked up as he recalled the memory still fresh in his head. The left fielder entered as a pinch runner in the sixth inning and broke the game open with a two-run double off the top of the center-field wall in the eighth, helping the Giants beat the Kansas City Royals 5-0 on Sunday night to take a 3-2 lead in the best-of-seven series.