The 49ers, under general manager Trent Baalke, have had a strong desire to stop the run and to get after the quarterback. This plan was working swimmingly when the line boasted Justin Smith, Ray McDonald and Aldon Smith, and a healthy Glenn Dorsey and Ian Williams. However the first three guys are gone, and the latter two cannot stay healthy.
The Niners primary goal this off-season is to rebuild from inside-out, starting in the trenches. The roster currently has 13 players listed as being on the defensive line.