A quilt for boys doesn't have to feature novelty print fabrics. My personal thought is that you are more likely to make something with lasting appeal if you don't go all out on a sport print. Or if you really want to use it, use it for the backing, and draw your color scheme from that to do a traditional pieced front with solids or near solids. My sons love very classic, graphic designs-- so flying geese, 9patch, half square triangles in any number of settings -- using 2 or 3 fabric colors -- instant classics. And the sport specific fabric can be the backing and the pillow case to go with.