Mattison (neck), who was placed on season-ending IR on Monday, does not have a career-ending injury, David Furones of the South Florida Sun Sentinel reports.

EDGE Analysis

Mattison suffered a neck injury during Sunday's preseason tie against the Bears that required surgery, and it will cause him to miss the entire 2025 season. It's encouraging that the running back may return in 2026, though given that he inked only a one-year deal with Miami this offseason, it's likely that his next opportunity will come with another organization. With Mattison on IR, both second-year pro Jaylen Wright and rookie sixth-rounder Ollie Gordon will benefit from a clearer path to touches behind starter De'Von Achane.

The Dolphins placed Mattison (neck) on injured reserve Monday.

EDGE Analysis

Mattison emerged from Sunday's preseason tie with the Bears with neck soreness and then reportedly underwent neck surgery not longer afterward, per Adam Schefter of ESPN. With Mattison's move to IR, the severity of the injury more or less has been confirmed, and he'll miss the 2025 season, barring getting cut with an injury settlement. Both Jaylen Wright and rookie Ollie Gordon now both have clearer paths to locked-in reserve roles behind Miami's top RB De'Von Achane.

Mattison reportedly underwent season-ending neck surgery Sunday, Adam Schefter of ESPN reports.

EDGE Analysis

Further confirmation is needed from the Dolphins, but it looks like Mattison, who hurt his neck during Sunday's game against the Bears, is a candidate for IR. In Mattison's looming absence, look for the team to add depth to a backfield that also includes De'Von Achane, Jaylen Wright and Ollie Gordon. Per Schefter, Miami plans to host Jamaal Williams for a workout Monday.

Dolphins head coach Mike McDaniel said Sunday that Mattison is "doing well" after being forced out of Miami's preseason game against the Bears due to "neck and shoulder soreness," David Furones of the South Florida Sun Sentinel reports.

EDGE Analysis

McDaniel confirmed that Mattison currently isn't in the concussion protocol, per Furones. The veteran running back looked capable before leaving the field Sunday, recording three carries for eight yards and a score plus one catch for 21 yards on two targets.

Mattison went to the locker room during Sunday's preseason game against the Bears due to an apparent head injury, Alain Poupart of SI.com reports.

EDGE Analysis

Mattison was tackled and thrown to the ground head-first early in the fourth quarter, which prompted trainers to check in on the veteran running back. He was able to walk off the field and into the locker room under his own power, but he's unlikely to return to Sunday's exhibition game, which opens the door for Ollie Gordon to lead the backfield down the stretch. If Mattison doesn't return, he'll finish with three carries for eight yards and a touchdown along with one catch (on two targets) for 21 yards.

Mattison is signing with the Dolphins, Jordan Schultz of Fox Sports reports.

EDGE Analysis

Mattison is swapping teams with Raheem Mostert, whose deal with the Raiders was reported about two hours earlier. While Mostert perhaps has a chance to rebound from a disappointing 2024 and earn a key role, Mattison will merely be competing for a backup job behind De'Von Achane. The Dolphins presumably hope 2024 fourth-round pick Jaylen Wright secures the second spot on the depth chart, with Mattison essentially being a backup plan for the backup. It's a tough situation for earning playing time, albeit with the outside chance of a handsome payoff if injuries eventually thrust him into a starting role in Mike McDaniel's offense.

Mattison rushed the ball six times for 20 yards in Sunday's 34-20 loss to the Chargers. He added four receptions on five targets for 11 yards.

EDGE Analysis

Mattison served as the clear lead back for Las Vegas with Ameer Abdullah (foot) sidelined, though he had only one rushing attempt after halftime despite the Raiders being down one score until late in the contest. The story of this game also encapsulated Mattison's campaign, as he averaged a miserable 3.2 yards per carry in one of the least explosive offenses in the league. He'll hit free agency this offseason and will likely sign a short-term deal with the hopes of serving as a change-of-pace back.

With Ameer Abdullah (foot) ruled out for Sunday's season finale against the Chargers, Mattison is in line to start at running back for the Raiders in Week 18, per Tashan Reed of The Athletic.

EDGE Analysis

Mattison, who carried 10 times for 32 yards and caught one of three targets for six yards in last weekend's win over the Saints (a game in which Abdullah logged 20 carries for 115 yards to go along with three catches), is thus in line for an expanded role Sunday, with Chris Collier and Dylan Laube, to a lesser degree, available to mix in. With that in mind, Mattison offers fantasy managers who are dealing with injuries or resting starters with a Week 18 pivot option.

Mattison is expected to be the Raiders' starting running back Sunday versus the Chargers with Ameer Abdullah (foot) listed as doubtful for that contest, Tashan Reed of The Athletic reports.

EDGE Analysis

Among his 13 appearances this season, Mattison has surpassed 4.0 YPC just one time (5-60-0 back in Week 4 against the Browns), and overall he's averaged 3.2 yards on his 126 rushes to date. He at least has supplemented poor performance on the ground with 32 catches (on 43 targets) for 283 yards while also scoring five total TDs. With Abdullah likely sidelined this weekend, Mattison should take on an expanded role, but he also may yield RB reps to Chris Collier and maybe even Dylan Laube.

Mattison rushed 10 times for 32 yards and caught one of three targets for six yards in Sunday's 25-10 win over the Saints.

EDGE Analysis

Mattison somewhat surprisingly ceded the start at running back to 31-year-old Ameer Abdullah, who proved to be far more effective with 20 carries for 115 yards to go along with three receptions for 32 yards. Abdullah likely earned himself first dibs at a larger share of the backfield workload again in Week 18 versus the Chargers, as Mattison's efficiency concerns remain.