 Herremans is an advocate for the medical use of cannabis, which he says can help reduce addiction to opioids among NFL players.Herremans says he found cannabis to be an effective pain reliever while playing in the NFL, prior to failing a drug test and discontinuing its use during his second season.Herremans is a member of Athletes for Care, a group that advocates for athletes on various issues of health and safety including the use of cannabis as medicine.