Left guard
Assuming Whitworth leaves and Noteboom moves to left tackle, there will be a vacancy at left guard. Fortunately, the Rams have a few possible candidates to slide in and start. Austin Corbett was sufficient down the stretch this season, while Edwards and Blythe can both play guard, too.
It’s possible Edwards, Evans or an outside player could replace Whitworth at left tackle, which would let Noteboom stay at left guard. That’s not to say they shouldn’t bring in some competition for him, though, given the struggles he experienced in his first year as a starter.