That is Polish discus thrower Piotr Malachowski, who won a Silver medal in Rio. He just auctioned off his newly won medal to help a young boy, Olek, who is battling eye Cancer. The money was spent on flying Olek to New York, where they have the safest and most effective treatment for his type of Cancer.
This was his post on Facebook
““In Rio I fought for the gold. Today I appeal to everyone ― let’s fight together about something that is even more precious: the health of this fantastic boy. If you help me, my silver can be more precious than gold.”