There's a helmet technology in place that allows teams to assess the force and impact of a blow to a player's head in real time. However, the system has yet to be adopted by the NFL. Eight NFL teams reportedly planned to use the HIT system in 2010 before it fell through at the last moment. Two years later, the technology remains unused. "I've been comfortable with the questions that we've asked and the validation studies that have been done to this point, and I feel as though we probably could have had this system in place a year or so ago," University of North Carolina professor Kevin Guskiewicz said on ESPN's "Outside The Lines". "It absolutely can work in the NFL. I've been doing it for eight years, so I know it can be done."