The chain gang has been an essential part of the NFL game for as long as one can remember, but it's undergoing a change in 2025. Beginning next season, the NFL is expected to replace the chains ...

Beginning next season, the NFL is expected to replace the chains — which are used to indicate the line to gain on a series of downs — with the Hawk-Eye virtual measurement system, NFL ...

While the system will replace the traditional chain measurement ... that is not what this Hawk-Eye system will do. Instead, it will theoretically provide more accuracy and efficiency when it ...