http://espn.go.com/blog/st-louis-rams/post/_/id/12455/greg-robinson-still-awaiting-his-opportunity
If they wanted, the Rams could easily plug Robinson in at left guard and kick Saffold over to right guard in place of Joseph. Or, barring that, they could at least get Robinson in the game as part of a rotation, something they were willing to do last year at times.
Even if you operate under the assumption that Robinson will have his share of hiccups, especially as a pass blocker -- and he will -- why not get him in there to take some lumps while also adding a player who might be able to help the run game somewhere else besides the left side? If both Joseph and Robinson are going to have issues protecting quarterback
Austin Davis, wouldn't it be worth seeing if Robinson can provide more punch in the run game?
The Rams are about to enter the teeth of their schedule with physical matchups against San Francisco and Seattle over the next two weeks. Robinson was drafted for just these types of games. But he can't help the Rams stare down the neighborhood bullies if he's not allowed to leave the house.