The Dolphins added a bulkier body to their running back room on Thursday when they agreed to terms with 5-11, 220-pound Alexander Mattison, who spent last season with the Raiders after five with the Vikings. Mattison played in 14 games and started seven for Las Vegas last season, running 132 times for 420 yards (3.2 per carry) and scoring four touchdowns. Earlier in the day, the Raiders essentially replaced him with Raheem Mostert, who was cut by the Dolphins last month. For his career, Mattison has averaged 3.9 yards per carry on 716 attempts, with 15 touchdowns.
He also has 136 career receptions for 1012 yards (7.4 per catch) with seven touchdowns. He averaged 4.6 and 4.5 yards in his first two seasons but has been below 4.0 per carry in three seasons since. Per PFF, he averaged 2.39 yards after contact in 2024, which was 49th in the league of 50 backs who attempted at least 88 carries last season.
On the plus side, Mattison converted 23 of 26 career chances on 3rd and 1 or 4th and 1. Mattison has appeared in 89 games and started 26 of them. The Vikings selected him in the third round, 102nd overall, in 2019 out of Boise State.
He joined the Raiders last March, 14 days after the Vikings released him one year into a two-year, $7 million extension. Mattison, 26, gives the Dolphins a bigger back to complement the 5-9, 188-pound De’Von Achane and the 5-10, 209-pound Jaylen Wright. Miami is expected to add an additional running back or two in the draft process.