According to someone close to San Diego Chargers LB Shawne Merriman, the recommendations from doctors and other advisers is that he undergo surgery on his left knee immediately and get ready for 2009. But Merriman presses on, defying so far the advice of those who say he should not. "I'm stubborn as hell," Merriman said yesterday. He will not detail what advice he is getting. "If I listened to wha