Hello new to the forum. I've been shooting quite a bit of high school football and I've been experimenting with underexposing my images in camera to further decrease ISO. Underexposed by -0.3 has been causing some weird results and I am curious if I'm missing something. I'm shooting a D750 with a Sigma 70-200mm F 2.8. I have field access; I'm fine at 1/800, F 2.8, and roughly 6400 ISO, but I wanted to run at F 4 for faster focus. That pushed me up to 12800 which is ahh ahh grainy; usable, but not great. -0.3 got my ISO down, but my photos are appearing over exposed in places and are harder to edit. Doesn't make sense to me. LR can't seem to dehaze enough. Not a pro by any means, internet taught hobbyist would be a good description. Is this a viable strategy for high ISO management? Shouldn't I be able to make up a stop or two in LR? Am I thinking of EC correctly? Any suggestions? Thank you.