Grody Meat

We had bought a box of 6 individually shrink wrapped Stampede boneless beef ribeye steaks not too long ago from WalMart. I mention this because today we pulled out the last two from the freezer, and found that one was all dark green and otherwise discolored and just looking really nasty, so we didn't dare open it. How does a shrinkwrapped piece of meat that has been constantly frozen get to look like that? Anyway, we found something else to have for dinner.