The Miami Dolphins made a roster move on Wednesday, promoting quarterback Logan Thomas to the active roster from the team's practice squad. The team announced the move, and the corresponding waiving of guard/tackle Jeff Linkenbach to make the roster space, on Twitter.
The move appears to be an odd one, as there is no clear reason for the Dolphins to suddenly add a third quarterback to their roster, especially as there are no reported injuries to either starter Ryan Tannehill or backup Matt Moore. The most likely explanation is that Thomas was going to be poached off the practice squad by some other team, and the Dolphins chose to protect Thomas by brining him to the 53-man roster, rather than allowing him to sign somewhere else.
Thomas joined the Dolphins in September after being waived by the Arizona Cardinals. He was waived by Miami five days after they acquired him, then signed to the practice squad, where he has spent the remainder of the season. He was a fourth-round draft choice of the Cardinals out of Virginia Tech in 2014. He appeared in two games as a rookie, completing one pass for 81 yards and a touchdown.