Preheat the oven to 400° F. Use the olive oil to grease a large sheet pan and set aside.
In a bowl, mix together the oats, buffalo sauce, carrots, celery, onion, ranch seasoning, and salt until thoroughly combined.
Add the chicken breast to the bowl and mix until combined.
Scoop 2-3 tablespoons worth of the chicken mixture into a ball and place on the greased sheet pan. You don’t need much space, just about an inch between each. All of the meatballs will fit on one sheet pan.
Bake for 25 minutes. Take out of the oven then cool. Optional: drizzle more buffalo sauce on top.