I had to be in an autoexposure mode since the lighting in the field changes so much from one part to another. The exposure was just a little overexposed so that is the reason for the -1 I normally shoot about - 1/3 anyway.
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Don, I am in the same lighting boat with the stadium where I shoot. What I try to do is establish the stadium lighting range after the sun is down. When I've determined the range of exposure values, if it isn't too much, say over 4 EV, I set my camera to the middle value and take care of any issues in post processing. This causes me a lot of post processing work, but it does sometimes save a shot that would have not been metered properly. Your way would work just fine, and if I weren't so hard-headed, I'd be working that way, as well.
Last night was our team's first game and there was a new photographer working with us, and she is a local pro. After half-time, she commented on just how bad the lighting is now that she sees it through the lens, instead of from the stands. Oh, to be able to shoot at a well-lighted venue!
BTW, how did Prattville's team do?
WM