Lost small tan dwarf hamster named Peanut with white belly patch last seen in exercise ball at Riverside Park.

I lost my beloved hamster, Peanut, near my apartment in Grand Forks. He's a small, tan dwarf hamster about the size of a fist, with a white patch on his belly. I last saw him in his exercise ball around 3 PM on Sunday at Riverside Park. I was letting him enjoy some fresh air when he startled and rolled away. He is super friendly and loves sunflower seeds if you happen to spot him. Please help me bring him back home!