Knit Short-Sleeved Sweater

Cute top by Margeaux & Ellie, size Large. The fabric is 60% cotton, 40% polyester. The shirt has some kind of discoloration on the front in the middle. The last picture is showing it the best way possible, as it really isn't too noticeable at all. Im sure some stain remover before being washed would take it right out. I've only worn this top maybe 4 times.