FILE - In this March 11, 2013, file photo, NFL Commissioner Roger Goodell takes questions during a news conference in New York. Marijuana is casting an ever-thickening haze across NFL locker rooms, and it's not simply because more players are using it. As attitudes toward the drug soften, and science slowly teases out marijuana's possible benefits for concussions and other injuries, the NFL is reaching a critical point in navigating its tenuous relationship with what is being recognized, more and more, as the analgesic of choice for many of its players. (AP Photo/Seth Wenig, File)
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