(February 7, 2017, 9:24 AM EST) -- SAN FRANCISCO — A group of former college football players on Jan. 30 filed suit in California federal court against a football helmet maker for allegedly making a defective product that led to head injuries to each of the plaintiffs (Mark Adams, et al. v. BRG Sports Inc., et al., No. 3:17-cv-00457, N.D. Calif.)....