Chris Borland, one of the top rookies in the NFL in 2014, abruptly retired before the 2015 season due to safety concerns. "I just honestly want to do what's best for my health," Borland said. "From what I've researched and what I've experienced, I don't think it's worth the risk."<ref>http://espn.go.com/espn/otl/story/_/id/12496480/san-francisco-49ers-linebacker-chris-borland-retires-head-injury-concerns</ref> | Chris Borland, one of the top rookies in the NFL in 2014, abruptly retired before the 2015 season due to safety concerns. "I just honestly want to do what's best for my health," Borland said. "From what I've researched and what I've experienced, I don't think it's worth the risk."<ref>http://espn.go.com/espn/otl/story/_/id/12496480/san-francisco-49ers-linebacker-chris-borland-retires-head-injury-concerns</ref> |