Cleaning and Stain Removal - Help removing set-in mud stains (already in dryer!)

I was doing my laundry as usual and after taking my clothes out of the dryer I noticed mud stains on one of my favorite shirts. Obviously I did not notice the stains when I put them in the wash (and of course when I put them in the dryer).

I was wondering if anyone knows of a way to remove mud stains from a shirt that has already been in the dryer. I would use bleach on the shirt since it's predominantlywhite, but there is also color on the shirt that I do not want to get ruined.

Anybody able to offer some advice?

The heat most likely made the stains permanent. Aggressive cleaning to remove the stains, may damage the remaining color and fabric. You may want to try hydrogen peroxide applied in small amounts to the area let sit 10-15 mins then launder as usual in plain water only (hot)...by itself.

Test any diy method in a hidden area before doing entire shirt.

I'm guessing, like you, that I'm probably out of luck with this, but I'll certainly try your suggestion. Thanks very much for the tip.

Mud is a protein stain. Protein stains are best treated by soaking and/or washing in cold water. Heat tends to set protein stains. Enzyme digester cleaners, stain removers, and laundry agents are available for treating protein stains. These can be applied to stains. Unless clothing has stable dyes, white shirts with colored trim can suffer from dye bleed.