LB's? Looking at Spotrac, if their info is up to date I see Zach Cunningham, Deion Jones, Myles Jack, and Kwon Alexander listed as available free agents. Chase Hansen too.
Guards? A few old guys like Rodger Saffold, Michael Schofield and Justin Pugh. In the under 30 group Dalton Risner, Trai Turner and guys I've never heard of. Not much to speak of, really..