This is following the same trend as last season. It late May last year, we locked up our three 6th round picks(Parmele, Thomas, Hilliard), our 7th round pick(Dotson) and 4th round pick(Murphy). Our third round pick(Langford) then signed in early July. Our two second round picks(Merling, Henne) signed in the days leading up to TC(Henne actually signed the first day of camp). Long of course was locked up before the draft.
It appears the same thing will happen this season. Nalbone is likely not the only one who is going to sign in the coming days. I wouldn't be surprised to see Nalbone, Folsom, Gardner and Clemons locked up within the next two weeks.