The Broncos' free-agency exodus started on defense but has since toppled its offense.
The offensive line, a unit that expected to undergo changes, welcomed the addition of tackle Donald Stephenson and said farewell to guard Louis Vasquez, who was waived.
Evan Mathis, another guard, is on the open market with tackle Ryan Harris.
Harris, who returned to the Broncos last year and switched from right to left tackle because of injuries, will visit with the Pittsburgh Steelers on Thursday.
Harris signed a one-year contract with the Broncos last May after tackle Ryan Clady was placed on injured reserve because of a knee injury.