Robinson (knee) was placed on injured reserve Monday, Tom Pelissero of NFL Network reports.
Robinson's placement on injured reserve isn't a total surprise after it was previously reported the starting left tackle would miss 3-to-6 weeks with a knee injury. With his move to IR, he'll now be guaranteed to miss at least four games and possibly return at the later end of his estimated timeline. The Alabama product could come back before the season ends -- or at least by the postseason -- but in the meantime, Walker Little will take over at left tackle.