The number for this week's column is 3, which is the day that most of the best waiver wire options at running back were drafted last April. NFL teams exercised some major restraint in waiting until the 24th pick or later to draft the first running backs the last three years. A team had taken a back in the top 10 in each of the prior four years. But if the recent outbursts of late selections such as Khalil Herbert and Elijah Mitchell are any indication, teams should wait even longer. And fantasy players should likely be quicker to accept productivity from backs that scouts told them might peak as special teams contributors.