OAKLAND — When Reggie McKenzie took over as general manager of the Oakland Raiders last January, he knew it would be a long process to transform the franchise back into a consistent winner. Four games into first his season, it’s still a work in progress. The Raiders (1-3) head into their bye this weekend looking for answers into how to revive a running game, generate a pass rush and bolster a struggling secondary. “I understand patience. I can channel myself,” McKenzie said. “But nobody likes losing and I’m on the top of that list. We’ll get this thing turned around.” …