Marty Bennett is just mediocre

Perhaps Aaron Rodgers was on to something when he campaigned for Jared Cook to remain a Packer.

We all know what happened next. Cook and general manager Ted Thompson couldn’t agree on a number and Cook ended up in Oakland.

But Thompson didn’t leave the cupboard bare. He went out and signed Martellus Bennett, who was coming off his second-best season of his career. He caught 75 percent of his targets from Tom Brady for 701 yards and seven touchdowns en route to his first Super Bowl ring.

But there’s one problem:…