Sources: Chiefs plan to franchise tag Eric Berry

— -- The Kansas City Chiefs plan to place the franchise tag on safety Eric Berry, effectively keeping him off the free-agent market when the signing period begins March 9, according to sources.

Berry, 27, capped a remarkable 2015 season by being named NFL Comeback Player of the Year by The Associated Press.

He was diagnosed in November 2014 with Hodgkin lymphoma, shortly after complaining of tightness in his chest after a game against the Oakland Raiders.

But Berry, buoyed by his conditioning sessions even through his chemotherapy treatments, was cleared to return to football by both personal physicians and team doctors shortly before the start of training camp last summer.

Things progressed in stages from there. Berry quickly was allowed to participate in contact drills, earned his starting spot back and -- over the last several games of the season -- played as well as he had at any time before his illness.

Berry finished third on the Chiefs in tackles and had two interceptions. After the season, he played in the fourth Pro Bowl of his six-year NFL career.

Berry joined the Chiefs as a first-round draft pick in 2010 from Tennessee.