The 2010 NFL Draft class is a highly regarded group of pro football prospects, but some NFL scouts worry that a problem lies beneath the surface. Sports Illustrated reports that "numerous NFL personnel evaluators" are worried by the number of players with marijuana use in their past. According to one source, nearly a dozen potential first-round draft choices could be red-flagged for using the drug in college.
While another talent evaluator described the trend as "almost epidemic," ProFootballTalk notes that "the issue would better be described as an epidemic of guys getting caught." The SI article has more details about the marijuana concerns.