What to Watch for in Week 1 of NFL Preseason Panthers: Who will stand out at cornerback? With Ross Cockrell out indefinitely after breaking his leg, rookie Donte Jackson is expected to battle third-year veterans Kevon Seymour and Lorenzo Doss for the No. 2 corner job. Doss has impressed coach Ron Rivera in practice: "He reminds me a little of Josh Norman." Amini Silatolu was considered a potential leading candidate to take over for the departed Andrew Norwell at left guard until he suffered