The Kansas City Chiefs have officially signed running back LeSean McCoy. Shady, as most call him, was released by the Buffalo Bills on the cut-down day and quickly found a new home in Kansas City. He'll reunite with coach Andy Reid and will earn $3 million with the chance to make a million more.

Adding McCoy to the mix in Kansas City appears to be a smart move for both the team and player. The Chiefs will run a running back by committee approach to supplement their elite passing game. McCoy, at 31 years old, should be elated to run in that kind of attack; as in his last year in Buffalo, he showed that being a bell-cow is likely behind him.

However, the chief principal in why McCoy signed is likely within their coaching staff. Shady enjoyed a fair amount of success as a pro with Reid as his head coach. McCoy averaged 756 yards rushing and 7.5 touchdowns a year with Reid coaching him. Take out his rookie year (as a backup) and an injury-shortened 2012, and those numbers spike to 1,194.5 and 12 touchdowns a season. In 2011, he went to the Pro-Bowl with Reid as a coach as he rushed for 1,309 yards and 17 touchdowns.

It doesn't hurt that McCoy will also join one of the NFL's historically great offenses that scares defenses with the pass more than the run. Defensive coordinators won't be able to key in McCoy like in Buffalo; if they do that, they let Patrick Mahomes, Travis Kelce, and Tyreek Hill scorch their defense.