The Ole Miss wide receiver is looking to make his mark during spring practice. OXFORD, Miss. — When Jalen Knox transferred from the Missouri Tigers to the Ole Miss Rebels, he had a large number of road blocks to overcome. The Rebels wide receiver dealt with injury and credit hour issues following his transfer, and now in spring camp, he is back to “100 percent” and ready to help fill some voids in his position group. With the departure of Jonathan Mingo and Malik Heath to the NFL, the opportunities are now there for new playmakers. “It’s been fun,” Knox…