In the league that I am talking about, we have large roster sizes and we can draft more than double the number of starters. So we have a few extra roster spots to spend (in excess of 2x number of starters). I need to decide how I will allocate those extra spots by position. Injury potential is one of my criteria.
My gut feeling is that DLs are injured the least, then DBs, and then LBs. However, last year was especially bad for DBs (E Reed, Madieu Williams, T Parrish, A Rolle, Darius, Baxter, Kiel, Hamlin, R Harrison, etc.). It did not seem as bad for LBs (R Lewis, Spikes, Hartwell, and to a minor extent Pierce, Zach, Cato). At DL, B Berry was the most notable one to miss significant time, other than that, I don't recall one fantasy team hurting badly due to an injured DL.
I was curious is someone had done calculations over several years. On offense, I think D Drinen made a study similar to that, and calculated the average number of games missed to injury for QBs, RBs, WRs, TEs.