Knee ligament strain according to WSCR. That was just on the first report. Since then, they are only saying that it is "a knee injury with no other information available at this time". :( I'm more than a little worried about the injury. J Hood said that he might be out for a while. Granted, this was right after the first report but it still is a little unsettling. On the plus side, Frank Thomas is going to be out much longer than expected, at least till mid-June, and will have to have at least 100 minor league at bats before they bring him up.