Multiple NFL personnel officials have reportedly told SI.com they are “concerned” about the “increased number” of the 2010 draft prospects who “have a history of marijuana use.” Many of the players have already acknowledged a failed drug test for cannabis in college, in their interviews with team representatives.

One personnel manager told SI.com’s Don Banks that “10 or 11” possible first-round draft picks have been “red-flagged for marijuana use” in college, an estimate also made by two teams’ head coaches.

Another NFL head coach guessed that “one-third” of the players on his team’s draft board had “some sort of history with marijuana use” and would thus require an “extra level of evaluation” as part of the pre-draft scouting procedure.

“Marijuana use is almost epidemic, with more guys having tested positive for marijuana at some point in their college background than I can ever remember,” said a team personnel specialist. “It’s almost as if we are having to figure out a new way to evaluate it as part of the character and background report, because it’s so prevalent.”