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Miami Dolphins place Koa Misi on injured reserve (Update)

The Miami Dolphins have placed linebacker Koa Misi on injured reserve today.

The move makes room on the roster for the Dolphins to add cornerback Bene' Benwikere off the waiver wire. The cornerback was cut Friday by the Carolina Panthers after he struggled to cover Julio Jones the previous Sunday, allowing Jones to have a good portion of his 300-yard day against the Panthers.

The Misi move is a stunner. One NFL source said Misi's neck injury could potentially be career-threatening. Misi has been seen by at least one specialist and is expected to seek the advice of others.

Misi missed the last two games with a neck injury but there was no public indication the injury was serious enough to have him miss the remainder of the season much less threaten his career.

Although Misi is eligible to return to the roster after eight weeks, that seems unlikely. Aside from the injury's seriousness, the Dolphins have at least one other players on injured reserve -- defensive tackle Earl Mitchell -- that they'd like to bring off injured reserve and he is eligibile to return in four weeks.

Misi, 29, finishes the year on injured reserve for the second consecutive year.

Misi has not been able to stay healthy to play 16 games in a season since 2010, his rookie year in the NFL.

The Dolphins have been playing Donald Butler for Misi and that seems the direction that will continue.