Welcome to the Mullen boys lacrosse page. The Mustangs are working toward their first state championship in the sport. They will compete in Class 5A (the larger of the two classifications) and will be in the Centennial League along with Arapahoe, Cherokee Trail, Cherry Creek, Eaglecrest, Grandview, Overland and Smoky Hill. There will be 40 schools in 5A and 16 will advance to the state bracket. Since sanctioning in 1999, only 10 schools have won titles.