In a large bowl, stir together the oats, whey protein powder, and ground cinnamon until evenly combined.
Add the peanut butter, maple syrup, and vanilla extract to the dry mixture and stir until the mixture begins to come together.
Fold in the chocolate chips and raisins so they are evenly distributed.
Add the almond milk and mix (or use clean hands) until the mixture holds together when pressed; add a little more almond milk if too dry.
Divide the mixture into 10 to 12 even portions and roll each into a ball, placing them on a tray.
Refrigerate the tray of balls for at least 30 minutes to firm up.
Optionally, sprinkle a little extra cinnamon on the chilled balls before serving.