Dolphins tight end Jordan Cameron out for season because of career-threatening concussion

Miami Dolphins tight end Jordan Cameron was placed on injured reserve and will miss the rest of the season because of a concussion that threatens his career.

Cameron has been sidelined since Week 3 and has been seeing a concussion specialist in Pittsburgh. He said this week he was improving, and he hoped to return this season, but the Dolphins decided to replace him on the roster.

The concussion was at least the fourth for the 28-year-old Cameron since he joined the NFL in 2011.

Cameron made the Pro Bowl with Cleveland in 2013, but has totaled only 43 catches and four touchdowns in two seasons with Miami.

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Bills Coach Rex Ryan said he expects Percy Harvin and LeSean McCoy to play at Seattle on Monday night. Buffalo signed the previously retired Harvin on Tuesday because of injuries to receivers. McCoy (hamstring) is listed as questionable while Ryan ruled out starting defensive tackle Marcell Dareus (groin) and his backup, Corbin Bryant (shoulder). … With Aqib Talib out and Kayvon Webster questionable for Denver’s showdown at Oakland on Sunday night, the Broncos promoted cornerback Taurean Nixon from their practice squad. To make room, they released veteran tight end John Phillips. …

The Chiefs have brought back Knile Davis, completing a bizarre odyssey for the running back that began with a trade from Kansas City to Green Bay and included a fleeting moment with the New York Jets. Defensive end David King was also promoted to the active roster Saturday, while Parker Ehinger was placed on injured reserve because of a knee injury and fellow offensive lineman Jordan Devey was waived. …