According to the PD, Lee's injury is still bothering him and may cause him to miss time at the beginning of the season.
Here's the link: http://blog.cleveland.com/sports/2007/03/injury_likely_to_sideline_trib.html

Hopefully this doesn't linger throughout the year. We can't afford to have him gone for any extended period of time. Although it is nice to have starting pitching depth.