The center and right ones are 2017-D. The one on the left is not. It has had a hard life, and come into contact with "undesirable elements", like your parents warned you about.
I've rescinded the "Best Answer" attribution due to subsequent edits to your original post. Sorry, that's how I CAC.
You DO realize, of course, that I have a boot mud scraper that bears an uncanny resemblance to your avatar.
Wow, I just realized - I moved to an inner city area again. I don't need mud scrapers any more. I just need to occasionally scrape off the grayish crud that collects on cities now.
Environmental damage (sort of rusted it). It's worth ten cents. If these coins have been in the ground, the water, soil, air etc. turn the coating this color.
I told this story before. I knew a young lady whose baby umm, err, ran a dime through its entire digestive tract. It looked like that too. If that thought doesn't get you wanting to just spend it, I can't help you.
Welcome to the neighborhood @Fancymoney ! You don't have to forgive Bellman and Corgi for their bad manners if you don't want to. Chris