Kansas City Chiefs safety remains in concu sion protocol and his status for against the Cincinnati Bengals Joe Kelly Jersey is still uncertain. But coach Andy Reid said that Mathieu, a key cog in the Chiefs' secondary, is doing well and has a chance to play in what would be his third consecutive AFC title game, .Mathieu exited in the first quarter of Kansas City's thrilling 42-36 overtime win over the Buffalo Bills in the Divisional Round after taking a blow to the Cody Bellinger Jersey helmet from teammate 's knee, and did not return. The Chiefs defense suffered in his absence on what was a big pa sing night, in a losing effort, for Bills quarterback .The Chiefs are preparing for another top quarterback in the Bengals' , making Mathieu's presence all the more important. Per Pro Football Focus Clayton Kershaw Jersey , Mathieu is ranked as the No. 38 safety in the NFL this season, but his 75.4 grade in coverage ranked 17th.Mathieu was the only Chief not Max Muncy Jersey to participate in practice on Wednesday. He was named to his fourth Pro Bowl this year after making 76 tackles, three interceptions and three fumble recoveries in the regular season.Running backs (shoulder) and , who didn't play in the Divisional Round, were full participants along with cornerback (back), Mike Piazza Jersey who was also inactive against the Bills, wide receiver and defensive lineman .