Mayo said his tackling has been solid — he separated Baltimore rookie running back Ray Rice from his headgear during an exhibition game — but that he needs to improve his pass rush and pass coverage.
"It's the schemes," Mayo said of the college-to-pro transition, "and the thing about the NFL is, everybody's good. Especially when you're learning a new defense, it gets a little difficult because you're second-guessing yourself. As you continue to learn the playbook, you start to play faster.
"Just learning the playbook. The playbook is huge, it's huge."