To make room for the additions, the Saints waived two other undrafted rookies, offensive lineman Cory Helms and fullback Ryan Yurachek.
These four transactions became official Thursday (June 14), and although the Saints agreed to a deal with veteran running back Terrance West, that signing is not yet official.
The 6-foot-4 Darling primarily played left guard and left tackle at Miami, and that versatility will surely help him compete for a role with the Saints.
The 6-foot Smith had minimal production at Tennessee, maxing out at 23 catches for 307 yards in 2015.
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