On page 53 of the February 4th edition of "The Sporting News", they have the following:

"Cubs LF Alfonso Soriano caused concern among North Side fans last week when he said "I don't know how I feel about my leg," in response to a question about the health of his torn quadriceps, which clearly slowed him late last season.  The Cubs got only 19 stolen bases out of him in 2007, and if he is still worried about the leg, they won't get many more this year."

I hadn't heard this.  Does anyone know anything about his health?  It would be a big blow to lose his speed, especially if he's going to lead off again.