Former two-sport star Bo Jackson told USA Today that he never would have played football had he known about the risks for head injuries when he was younger.
The NFL has demanded that the New York Times retract a story saying the league omitted concussion cases, according to a report.
Four Congress members have asked the NFL for information about why it attempted to intervene in the selection of a Boston University researcher to lead a study on football and brain disease.
Cardinals coach Bruce Arians says people who won't let their kids play football "are fools."
NFL research intended to have a full account of diagnosed concussions from 1996 to 2001, but the data missed about 10 percent of concussions from that period, according to The New York Times.
Jerry Jones said Tuesday that while he is supportive of efforts to make football safer, he cautions against linking CTE and football based on the data now available.
