To make room for Galyon, the Dolphins released second-year offensive lineman Troy Andrew.
The Dolphins also will bring in two players for workouts on Tuesday, veteran defensive lineman Joe Salave'a and linebacker Bobby Brooks.
Salave'a was released by the Tennessee Titans in the final cuts when they decided instead to go with youngster James Atkins, who was in Miami's training camp this summer.
Salave'a has been a solid player in the NFL, but the Dolphins are pretty well stocked along the defensive line.
As for Brooks, the re-signing of Galyon probably limits his opportunity.
Keep in mind that just because the Dolphins bring in players for visits doesn't mean they're about to sign them. The Dolphins like to have a prepared list of available guys they've looked at in case of an emergency.
Dolphins senior vice president Rick Spielman did say Monday he anticipated there might be changes made to the practice squad.
As of Monday afternoon, the practice squad included G Dwayne Pierce, RB Leonard Henry, LB Joshua Symonette, WR Sam Simmons and TE Shawn Draper.
As mentioned before, the re-signing of Galyon was expected because the Dolphins carried only five linebackers in the season opener against Detroit. Galyon wasn't quite ready to play in that game, so the Dolphins gambled that no team would sign him and released him so they could claim cornerback Lloyd Harrison.
It did come as somewhat of a surprise that Andrew was let go instead of rookie free agent Greg Jerman. Both players are versatile, and perhaps Jerman's ability to play tackle was the difference here.