Miami Dolphins Sign RBs Mike Boone, Aaron Shampklin After Alexander Mattison Injured

The Miami Dolphins have signed veteran running backs Mike Boone and Aaron Shampklin following Alexander Mattison's season-ending neck injury, placing Mattison on injured reserve. Boone, a 30-year-old with experience on four NFL teams, has 117 carries for 590 yards and four touchdowns in his career and played six games for the Panthers in 2024. Shampklin, 25, who previously played for the Pittsburgh Steelers and Dallas Cowboys, has six carries for 17 yards this season and is known for his unique journey from substitute teacher to NFL player. These additions increase competition for the RB3 spot behind starters De'Von Achane and Jaylen Wright, alongside Ollie Gordon. The Dolphins also waived wide receiver Monaray Baldwin to accommodate the new signings. Both Boone and Shampklin are expected to bolster Miami's backfield depth as the team copes with Mattison's injury.