Most sacks since the beginning of the 2011 season:
Jared Allen - 43.5 (in 47 games)
Aldon Smith - 42.0 (in 42 games)
DeMarcus Ware - 37.0 (in 44 games)
J.J. Watt - 35.5 (in 46 games)
Von Miller - 35.0 (in 40 games)
Robert Mathis - 35.0 (in 43 games)
Had Aldon not missed the time in rehab, he would probably be at 47.
If you account for all the guys who didnt even crack 35 sacks, its even more impressive. Guys like Tamba Hali, Chris Long, JPP, Cameron Wake, Charles Johnson, Robert Quinn, John Abraham, etc.
If Aldon can keep his nose clean and stay healthy, hes on pace to break Bruce Smith's all time leading sack record by age 33.