A monitor shows a technology idea as participants speak during a news conference about the role of technology in the NFL Tuesday, in San Francisco. With the 50th Super Bowl days away, the NFL is looking toward the future and how technology can change the game on the field and how it's viewed by fans over the next half-century. (AP Photo/David J. Phillip)
A monitor shows a technology idea as participants speak during a news conference about the role of technology in the NFL Tuesday, in San Francisco. With the 50th Super Bowl days away, the NFL is looking toward the future and how technology can change the game on the field and how it's viewed by fans over the next half-century. (AP Photo/David J. Phillip) David J. Phillip AP
A monitor shows a technology idea as participants speak during a news conference about the role of technology in the NFL Tuesday, in San Francisco. With the 50th Super Bowl days away, the NFL is looking toward the future and how technology can change the game on the field and how it's viewed by fans over the next half-century. (AP Photo/David J. Phillip) David J. Phillip AP