Even though doctors believe that Ike Davis has contracted valley fever, the first baseman says he is not suffering any symptoms of the disease. "I feel great," Davis said Sunday morning. "And I don't have any symptoms of it. I'm not coughing. I'm not throwing up blood. I'm not doing anything. It's not even hard to breathe. The doctor said I could play -- and just don't get really, really fatigued. So that's what we're doing. And if I get really tired, I kind of just step to the side and take a break." Davis was sent to New York for additional tests after reviewing an X-ray of his lungs during a routine physical. However, he says that subsequent blood work didn't positively identify the disease. Doctors told Davis his blood tests did not positively identify valley fever because he has either unknowingly had the disease for a while and it mostly has worked itself out of his system, or because the disease has yet to fully manifest itself.