http://sportsillustrated.cnn.com/2006/football/nfl/08/18/bc.fbn.texans.notebook.ap/index.html There is a possibility he will miss the entire preseason because of problems with his knee. He had arthroscopic surgery in December after his knee swelled and ached each time he played. He participated in drills during the first two days of training camp and said he felt good, but soon his knee became sore again, this time because of what doctors said was a bone bruise. Davis began running again a couple of days ago, but will not travel with the team to St. Louis for Saturday's second preseason game. If Davis is not healthy enough to play in any of Houston's three remaining preseason games, coach Gary Kubiak isn't sure if he would start him in the opener even if he's fully recovered. "I don't want to answer that right now," Kubiak said. "I think that would be very hard to do. I think he'd tell you the same thing. I don't know, stranger things have happened. Let's wait and see." "We're going to be patient," Kubiak said. "We know he can play the game. We just have to know that we're going to get there at some point. We'll keep our fingers crossed, and hopefully it'll work out." Kubiak said that while he's disappointed that Davis is out, he's not frustrated with the time it is taking him to return. "You try not to run out of patience because you have situations like that all the time," Kubiak said. "They tend to work themselves out."