Colts star Darius Leonard became the real Santa Claus for kids in Indianapolis ... by bringing them on a holiday shopping spree!!
Leonard teamed up with Walmart for his first "Shop With a Jock" event ... where 50 lucky kids from the Boys & Girls Club in Indy got to go shopping with the linebacker with $100 gift cards for the store.
The special moment was caught on camera -- Leonard walked down each aisle at the local Walmart with the kids who picked out gifts like clothes and toys.
After that, they got to eat Papa John's pizza with Leonard and his teammates!