Colin Kaepernick is likely being blackballed, according to ESPN’s Adam Schefter. There have been plenty of other reasons and excuses provided by NFL teams to explain why the former San Francisco 49ers quarterback is still a free agent, but Kaepernick’s protests from the 2016 season loom large. In a Thursday morning appearance on ESPN Radio’s Mike and Mike, Adam Schefter said he believes that NFL owners have tried to keep coaches and front-office personnel from going after Kaepernick. “Do I think that certain owners have blocked teams from visits or interest? I do, I do believe that,” Schefter said. “And...