After taking its lumps the last few seasons with an underclassmen heavy varsity team, John Hardin brings experience, starting nine seniors on defense and four seniors on offense after going 4-7 last season. Most of these kids have been playing varsity ball for 2-3 seasons and are primed for a breakout season.    On defense, the Bulldogs return four of their top five tacklers, including senior linebacker Cameron Moore and sophomore lineman Elijah Luna. Cameron Moore finished last sea