When the Miami Dolphins signed running back Alexander Mattison in free agency, nobody thought twice about it. Mattison was expected to be a forgotten depth piece who might not even make the team's final roster.
Less than one week into training camp, he is proving the doubters wrong.
According to Dolphins insider and ESPN reporter Marcel Louis-Jacques, Mattison is showing out in early training camp practices.
Alexander Mattison is dominating Dolphins training camp
In his notes from Saturday's practice, Louis-Jacques said Mattison "had perhaps his best practice with the team, showing some burst around the edge and quick footwork in traffic.