Miami Dolphins running back Alexander Mattison is out for the season after neck surgery, ESPN reported Monday.

Mattison, 27, sustained the injury as he was tackled on a 21-yard pass play in Sunday’s preseason game against the Bears in Chicago. He was taken in an ambulance to a local hospital where he underwent surgery.

He is expected to make a full recovery, per the report.

The Dolphins reportedly worked out veteran running back Jamaal Williams on Monday in a related development.

Williams, 30, was released by New Orleans in March. He had signed a three-year, $12 million deal with the Saints after having a career season with the Detroit Lions in 2022, when he led the NFL in rushing touchdowns.

But his production was meager in 27 games (five starts) with New Orleans. Williams had just 4

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