One scoring drive covered zero yards in four plays, sandwiched between rookie Jarvis Landry's 74-yard kickoff return and Caleb Sturgis' 51-yard field goal. [...] after Brian Hartline caught a 1-yard touchdown pass, he celebrated by practicing his putting stroke and was flagged 15 yards for unsportsmanlike conduct. On fourth-and-2 at the Chiefs 30, they attempted a 47-yard field goal and missed it in a scoreless game. [...] trailing by six points in the fourth quarter at midfield, Tannehill was sacked trying to throw on third-and-1, forcing a punt. Smith led touchdown drives of 62, 76 and 66 yards in a span of four possessions as Kansas City took a 21-10 lead. The defense protected the early advantage, allowing only four third-down conversions. The Chiefs were without seven starters, including running back Jamaal Charles, who was inactive because of a high ankle sprain.