The Detroit Lions may be without one of their top cornerbacks during a portion of organization team activities and mandatory minicamp. Speaking at a charity event, third-year defensive back Terrion Arnold shared that he was unsure if he would cleared to participate at the end of the month, when the team gather for a series of organized team activities and a mandatory veteran minicamp. “As far as OTAs and stuff, I don’t know about that," said Arnold, via the Detroit Free Press . "That’s kind of up to them and just where I’m at with my recovery and my treatment and stuff. But as far as training camp and stuff, I know I’m expected to be there.” Last season, Arnold missed a total of nine games due to shoulder injuries and a concussion. This season, it is expected again that he and veteran D.J. Reed will be the team's starting cornerbacks. The 23-year-old indicated he was feeling progress was steadily being made and that he was beginning to figure out nuances of Kelvin Sheppard's defense.…