Alexander Mattison was one of the best performers in training camp for the Dolphins. He sustained a neck injury in Sunday’s preseason opener at Chicago.

The Miami Dolphins have placed Alexander Mattison on injured reserve after he suffered a season-ending neck injury.

The surgery took place in Chicago on Sunday after Mattison injured his neck during the Dolphins' preseason game vs. the Bears. He was taken to a local hospital via ambulance from the game to undergo surgery, ESPN's Adam Schefter added. While he’s expected to make a full recovery, he will not be available for the Dolphins this year.