Because he practiced in training camp, Poole could not be put on PUP, so the Dolphins' only options were to keep him on the active roster, waive him injured or put him on injured reserve, which would have sidelined him for the entire season.
Poole hasn't practiced in a few days because of issues with his surgically repaired left knee and there's no telling exactly when he'll be ready to play, but it's clear the injury was significant enough that Saban felt the need to make the move.
The former fourth-round pick showed great promise as a rookie in 2004, but blew out his knee in an offseason workout last May and was off to a slow start in camp.
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Former Pro Bowl outside linebacker Kevin Greene was at practice on Tuesday as a guest of the Dolphins. The idea was to have Greene do some coaching with the outside linebackers.
"He's a 3-4 outside backer guy that we had as a guest," said Saban. " We have a guest speaker about every night. He's a guest speaker on the field to talk a little bit to our outside backers about pass rush and maybe some of the techniques that he played -- maybe help some of our coaches as well. He was an outstanding 3-4 outside backer and was very productive, so we could use a player like that to try to improve our expertise as something that we would always welcome.
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Defensive end Jason Taylor was back at practice on Tuesday morning after missing several days with what was reported as a back injury.