Stains on white baseball pants detract from their otherwise sharp look. One of the most common stains comes from the iron in the red clay that's used on the infield. Remove the stains by using a commercially prepared iron removal product in the washing machine. Once most of the iron stain is gone, bleach helps to remove the final traces.
Remove any loose dirt
Shake the pants to remove any loose dirt. If there is caked on mud, use the dull edge of a spoon to scrape away the mud before washing. Remove as much as possible before putting the pants in water.
Fill the machine
Set the machine to warm water and the appropriate level. Add 1/2 cup of the iron removal product as the machine fills. Add the baseball pants and any other articles of clothing with yellow or rust stains to the machine. Stop the agitation of the machine while the clothes soak.
Add the normal amount of detergent and start the machine again. Allow the machine to finish the cycle.
Check for stains
Check to ensure the product has removed the stain before drying.
If the stain remains, rewash the pants, without drying, in detergent, adding 3/4 cup of chlorine bleach to the wash cycle.