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NFL will test optical tracking system to measure for first downs in preseason
The NFL will test an optical tracking system for line-to-gain rulings this preseason, Jonathan Jones of CBS Sports reports.
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NFL to test optical tracking technology for yardage rulings this preseason, per reports
The optical tracking system, which would not use microchips ... This article originally appeared on USA TODAY: NFL to test optical tracking technology for yardage rulings this preseason, per ...