WTF is happening to all my T Shirts?

My T shirts are coming out of the wash with odd stains on. Only in the front, all seemingly in the lower half but could be middle, left or right. Not happening to my wife's clothes or my son's. They're not there when they go into the wash. It's slowly ruining all my t's. It's not the detergent as we've changed it. Any idea what the heck is going on?!