Buff Brock. That was the social-media buzz last month after fans saw photos of Brock Purdy working out at a training facility in Ponte Vedra, Fla. In one shot that captured Purdy in mid-throw, it looked like the San Francisco 49ers quarterback was developing biceps to match his fire-hydrant thighs.

Cody Benjamin of CBS Sports recently evaluated and ranked every NFL team's starting quarterback. San Francisco 49ers fans will be delighted to learn that Brock Purdy, the team's third-year signal-caller,