The Steelers will receive the Rams’ fourth-round draft pick in 2024 and the Rams’ fifth-round pick in 2025, and the Rams will receive the Steelers’ fifth-round pick in 2024 and the Steelers’ sixth-round pick in 2025.
The 6-foot-4, 321-pound Dotson, 26, started 17 games last season.
Rams rookie Steve Avila appears set to start at left guard, but Dotson could start at right guard or add depth as the Rams prepare for their Sept. 10 opener at Seattle.
Joe Noteboom and Tremayne Anchrum are other options at right guard.
The Rams’ line was questionable to begin with last season, and then was ravaged by injuries.
Stafford suffered a concussion and later a spinal injury that ended his season.
Rams coaches and players have said they expect the line to perform better this season. But it remains to be seen if the line can keep Stafford upright and open holes for running backs.