... need of one more roster spot with the additions of Erik Walden and Lionel Dotson, the Miami Dolphins waived rookie linebacker Micah Johnson.

Defensive end Clifton Geathers was waived Monday to make room for Walden, but another move was needed when the team signed Dotson off the Broncos' practice squad Tuesday.

An undrafted rookie out of Kentucky, Johnson joined the Dolphins in August after a brief stint with the New York Giants during the offseason.

Johnson was able to i...

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