Decorate cupcakes. Prepare three 16 in. decorating bags with Color Swirl coupler pieces. Fill bags separately with blue, medium yellow and white icing. Secure bags with bag ties. Assemble coupler pieces with tip 2A or 1M (see second image).
Pipe swirl on half of cupcakes.
Repeat with remaining Color Swirl coupler, filling bags separately with dark blue, medium red and white icing. Assemble coupler pieces with tip 2A.
Pipe swirl on remaining half of cupcakes.
Top each cupcake with football icing decoration.