Miami Dolphins sign RB Mike Boone; Alexander Mattison on injured reserve

AI-assisted summary The Dolphins signed running backs Mike Boone and Aaron Shampklin.

They placed Alexander Mattison on injured reserve.

Mattison suffered a season-ending neck injury during the Dolphins' tie with the Chicago Bears.

Boone is a 30-year-old veteran who has played 72 NFL games.

The Miami Dolphins made a series of moves at running back in response to Alexander Mattison suffering a season-ending neck injury.

The Dolphins signed running backs Mike Boone and Aaron Shampklin and placed Mattison on injured reserve.

Boone is 5-feet-10 and 206 pounds and is a veteran of 72 NFL games with four teams.

He has 117 carries for 590 yards (5.0 average) and four touchdowns.

He also has 26 receptions for 184 yards.

Boone, 30, first joined the Minnesota Vikings in 2018 as an undrafted free agent from Cincinnati.

Shampklin, 25, attended Harvard and played with Pittsburgh last season.

His career totals include six carries for 17 yards.

Mattison, signed as a free agent in March, was injured on a reception in the second half of the 24-24 tie with the Chicago Bears ..

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