The Rams' presumptive starting five from the beginning of the year played just 295 of the team's 968 snaps together last season, checking in just above 30 percent. Only three other units around the league spent less time together on the field.
The thing about the missed time is that it was expected. The Rams entered the year with a veteran but injury-prone group and it lived up to that billing. That's what makes the offensive line the team's top priority heading into the offseason. They need to get younger and more talented so they can finally have a group that sticks together awhile without having some sort of major makeover every offseason.
http://espn.go.com/blog/st-louis-rams/post/_/id/6527/rams-free-agent-preview-offensive-line
Ideally they draft 3 starters on the OL