What's Wrong with the Boss?

Is George Steinbrenner ill? Before last night's Major League Baseball All-Star Game, Steinbrenner was escorted to the pitcher's mound at Yankee Stadium to deliver the baseballs for the ceremonial first pitches. He looked terrible. He rode a golf cart and never left it.

Perhaps I have been under a rock, but is he ill? I noticed earlier this season that his son, Hank Steinbrenner, was front and center during the Jason Giambi controversy.