CHARLOTTE, North Carolina — Before a reporter could go there with Carolina Panthers rookie running back Christian McCaffrey, right guard Trai Turner took it there. Turner rightly figured the discussion would turn to the fact that McCaffrey is among the handful of white players at his position in the NFL. “Have you seen him run?” Turner asked. “If you’ve seen the guy run, you don’t think about it [his race]. White, black, red, green — I don’t care what color he is. He’s special.” Nine games into his professional career, McCaffrey has flashed the talent that prompted the Panthers to...