Headlined by former second-round pick Chase Claypool, the Green Bay Packers brought in nine players for tryouts at this weekend’s rookie camp. None of them were signed, a source said. Claypool was the big name. The other eight were undrafted and unsigned free agents. Claypool was a fifth-year pro trying to rekindle what had been a promising career. “You guys saw him, right?” coach Matt LaFleur said after practice on Friday. “Certainly, he had great film out there. He’s been productive, and he looks like he’s in great shape. He’s big. So, we’ll see how it goes.” During Friday’s practice that was open to reporters, the 11-on-11 work was conducted at half-speed. Quarterbacks didn’t even throw the ball to the receivers. So, it was hard for anyone to really break through to grab one of the vacant roster spots.…