Mattison’s neck-surgery injury renders him out for the season, reshaping the Dolphins’ RB2 landscape. His absence leaves a two-man race between Gordon and Wright, with Shampklin and Boone as late-season depth options. The depth chart now hinges on efficiency, pass protection, and Mattison’s potential return horizon.

Mattison is noted as already lost for the season with a neck injury, affecting the Dolphins’ early-season depth and pressuring the backfield to adapt behind Achane.

Alexander Mattison is reported to be out for the season due to a neck injury, clearing the way for Wright and Gordon behind Achane. The backfield now features a higher reliance on depth options, while McDaniel navigates Week 1 with Achane’s status potentially uncertain.

Mattison suffered a season-ending neck injury in the Dolphins' preseason opener, prompting Miami to test veteran depth by signing Aaron Shampklin and Mike Boone. His career has included nearly 2,800 rushing yards and a reliable receiving profile. This injury elevates Achane's workload while pressuring Wright and the rookie Gordon II to contribute sooner than expected.

Mattison’s neck injury deprives Miami of a bruising inside runner who could stabilize the ground game. His absence elevates Achane’s workload, but the inside run power gap remains a concern. Fantasy managers should monitor how the Dolphins deploy backup OL and how quickly Gordon II and Wright contribute to a more balanced rushing attack.