Well, it was not such a good night at the ball park - from a baseball or photography standpoint. Our boys lost and are now down in the loser's bracket - one more loss and we go home. Also, after the sun went down, I really couldn't get very good pictures without too much blur. It was good to experiment and research, though, and the real answer seems to be that I need a new lens. LOL!
On the up side, the hipstamatic iphone camera app took cool pix at night (like this one) and the loser bracket games are all at 5:00. So, I should be able to use my regular bag of photo tricks.