In helping USC capture a share of the national title, Poole started 11 games and finished with 80 tackles, seven interceptions and three sacks.
USC was the third college for which Poole played, following stints at Boston College and Ventura Junior College.
Poole was a second-team All-Big East selection at BC as a redshirt freshman, but then was suspended from the team and transferred to Ventura JC after sitting out a year and helping coach a high school team.
Poole said the reason he was suspended by BC was that he was caught stealing.
But Poole has been incident-free since that incident and his coach at Boston College even recommended Poole to USC coach Pete Carroll after his JUCO stint.
Dolphins GM Rick Spielman said Poole has the versatility to play the nickel or dime cornerback spot and also could be used at safety. Spielman also called Poole a hard-core special teams player.
"My goal is to come in and contribute," Poole said Sunday. "I want to go out there and learn the system and make plays."