The NFL will test an optical tracking system for line-to-gain rulings this preseason, Jonathan Jones of CBS Sports reports. If all goes well, the league will implement the technology for the regular ...

The NFL’s use of the decidedly low-tech 10-yard chain to measure first downs could be replaced by high-tech optical tracking. The league today revealed that a system to measure first downs ...

The days of measuring for first downs manually isn't over yet, but the NFL is moving closer to that point. The league has been testing optical tracking as a way to replace the chain gang as the ...