The Miami Dolphins, who entered Tuesday with three opening roster spots, filled at least two by re-signing quarterback Josh Freeman and offensive lineman Chris Martin.
Martin, a former UCF player, spent time with New England, Houston and San Francisco as a rookie last season but did not play in a game. The news of his signing was announced on Twitter by agent Brett Tessler.
The Dolphins auditioned several players at several positions Tuesday and are expected to fill the 90th roster spot at some point.
Training camp begins at 8 a.m. Thursday in Davie.