Cubs left fielder Alfonso Soriano says that his surgically-repaired left knee in finally feeling stronger. "Yesterday I was doing my running [up to] 85 percent, and I didn't feel anything at all," Soriano said Thursday. "I think I'm building something, because I'm feeling more and more power in my knee. "I think the work I did in the winter is paying off. I started running, hitting and doing a lot of stuff, and I don't feel any pain at all." Soriano hasn't fully tested the leg yet, but said that he plans to shortly. "The only thing I'm doing 100 percent is fielding," he said. "I don't feel any pain at all. "I think I need to trust it more. Before I felt my knee is good, now I need to trust it 100 percent."