That knee has been actually kind of sore, it was sore last year. ... It's been nagging at him a lot of this year. ... There's a difference between having your knee ache or hurt as opposed to maybe putting yourself in a place you don't want to. ... I fully expect he'll be hitting second tomorrow. ... We just want to make sure it's OK. ... He's got a little bit of a cartilage issue in there. We've known that for a long time. ... If that gets in the way, then you need to ... we just want to look at it and make sure.