By Tzvi Machlin After three years of lackluster results with Mike Mayock as their general manager, the Las Vegas Raiders have reportedly found his replacement. According to NFL insider Ian Rapoport, the Raiders are expected to hire New England Patriots executive Dave Ziegler as their new general manager. Ziegler served as the Patriots’ de facto general manager last year, working as their director of player personnel. Per the report, Ziegler was a key component to the Patriots’ quick turnaround in 2021. He’s been with the team since 2013 in a variety of front office roles. More notably, he has …