Berger, who walked on at tiny Michigan Tech, can play guard or center, but he's somebody who was brought in for depth as opposed to being able to compete for a starting job.
On the flip side, the Dolphins lost a free agent on Friday when Renaldo Hill agreed to a four-year, $10 million deal with the Denver Broncos.
Hill's departure from the Dolphins pretty much became a fait accompli after the team signed recently released Gibril Wilson on Thursday.
The Dolphins now have four remaining unrestricted free agents: CB Andre' Goodman, G/C Al Johnson, WR Tab Perry and LB Derek Smith.
You could also add to that list tight end Aaron Halterman, who became a free agent when the Dolphins declined to make him a qualifying offer as an exclusive-rights free agent.