DJ Reader Jamboree Observations: Grimsley: The Whirlies looked strong offensively both through the air and on the ground. With Chris Zellous and Quan Nora returning, Grimsley should continue to have success as long as they can get coverage. Back-up quarterback Jaquavion Mayo showed that he will be able to step in anytime they need him. The Whirlies defense exploded in the first ten plays of its first scrimmage. The defensive line shut down Southern Guilford’s running game and the secondary made some impressive plays as well. They played with lots of intensity and even when assignments were missed, someone moved…