Washington Nationals pitcher Livan Hernandez continues to be troubled by a sore right knee and could be headed for season- ending surgery. After Wednesday's 3-2 loss to the Rockies, Hernandez refused to discuss the problems with his knee. "I am not going to say anything about my knee," Hernandez said. "There is no decision now. I am going to make it tomorrow." The righthander said he's 99.9 percent sure that he wouldn't pitch again this season and hinted at other problems, either with himself or within the organization. Earlier in the year, Hernandez exited a May 14th game against the Chicago Cubs with inflammation in his right knee. The Nationals ace had the knee drained two days later and started in his next scheduled start against Milwaukee later in the week. Hernandez is 12-4 on the season with a 3.44 earned run average.