Joe McKnight high steps into the endzone in the third quarter (photo/NFL)

Joe McKnight high steps into the endzone in the third quarter (photo/NFL)

Alex Smith led touchdown drives of 62, 76 and 66 yards in a three of four possessions as the Chiefs took leads of 14-0 and 21-10.  Knile Davis, filling in for the injured Jamaal Charles ran for 132 in helping Kansas City to their first win of the season, 34-15 over Miami.

Smith went 19 for 25 for 186 yards, and hitting scoring passes of 11 and 4 yards to Joe McKnight, and 20 yards to Travis Kelce.  Davis rushed for a career-high on 32 carries, and he scored on a 21-yard run.

Miami’s Lamar Miller rushed for 108 yards and Ryan Tannehill struggled against a pass defense ranked last in the NFL. He went 21 for 43 for 205 yards.