Dickenson was brought in more for practice and scout team purposes than anything else, so don't look for him to appear in a game anytime soon. It's also likely he will be released as once Fiedler is ready to play again.
To make room for Dickenson, the Dolphins released cornerback Paul Miranda, who had been signed just a few weeks ago. Miranda, who has NFL experience with the Colts and Seahawks, had replaced Lloyd Harrison as the 11th defensive back on the roster.
The Dolphins also made a move on the practice squad on Tuesday, releasing guard Antwan Kirk-Hughes and signing wide receiver Margin Hooks, who was with the Dolphins during training camp.
As for Dickenson, he was in training camp with San Diego this year before being waived on Aug. 31. He was claimed by Seattle on Sept. 2 and spent each of the first three games with the Seahawks this year before being waived on Sept. 24. He did not see action with Seattle, and was designated as the third quarterback for two contests.
The 29-year-old Dickenson spent the 2001 season with the Chargers and was the third quarterback for all 16 regular season games. In preseason with San Diego this year, he completed 16 of 29 passes for 197 yards with two touchdowns and one interception.
Dickenson, who led the Calgary Stampeders to the Grey Cup (the CFL championship) in 1999, has some ability but at 5-11, 180 he is limited by a lack of size.