Terms of the deals were not disclosed.
Schwartz, a third-round pick from California, is expected to start at right tackle as a rookie.
Smelley has been impressive during the team's three-day rookie minicamp. The 6-foot-2, 235-pounder, a seventh-round pick from Alabama, was more of a tight end than traditional fullback for the Crimson Tide. Smelley has shown nice hands in snagging some of Weeden's throws.