They were the only two Lions to make either the first or second team, which shouldn't be too surprising considering the plethora of good running backs and linebackers in the league.
Levy not making the team is not a surprise, again, due to the difference between 3-4 and 4-3 outside linebackers and the statistics 3-4 outside linebackers accrue. Thought Warford would have a shot to slip in on the second team, but he did not.
Also, Warford was not among the five finalists for the NFL Rookie of the Year. No offensive or defensive linemen were among the finalists. Instead there were two wide receivers (Cordarrelle Patterson, Keenan Allen), two running backs (Giovani Bernard and Eddie Lacy) and a linebacker (Kiko Alonso).