Nike Men’s golf cleats size 9.5 EUC grey white

My son decided to join the golf team. He made it to six practices and walk through the muddy spot. I cleaned them with soap and water but did not scrub. He was not cut out for golf so I have this pair of cleats in his closet and they don’t fit him now anyway! You could see the little discoloration, but if you want to scrub the material part or put OxiClean. I’m sure it will come out. But you could see on the bottoms. He literally wore them a couple times. This was an expensive pair of cleats, so just trying to recoup any money. They are in excellent condition, but they wouldn’t even be dirty if he wasn’t an idiot!