The Chiefs' big jump was fueled by improved performances from several players. On offense, the grade PFF gave to running back Jamaal Charles went up dramatically from one season to the next. PFF's grade for quarterback Alex Smith in 2013 was vastly improved to that of his 2012 predecessors, Brady Quinn and Matt Cassel.
A few players had their grades drop. Wide receiver Dwayne Bowe and offensive tackle Branden Albert were among them, but neither player had a huge drop.
One player did have a huge drop; cornerback Brandon Flowers. He will participate in the Pro Bowl on Sunday in Hawaii, more of an honor for what he did in previous seasons than how he played in 2013.
Flowers had some dismal games in 2013, none worse than the torching he received against Dez Bryant and the Dallas Cowboys early in the season, and then by the San Diego Chargers halfway through. In fairness to Flowers, he missed a couple of games early in the season because of a sore knee, and it might not have been right the rest of the way.
Still, it's a fact that Flowers didn't play very well, and it's to the point it's natural to wonder about his future with the Chiefs. He's a 5-foot-9, 187-pound player on a team that now prefers bigger cornerbacks. It's more than a little telling that the Chiefs used Flowers to cover the slot receiver in their nickel defense as the season went on.
Flowers has a big contract (he counts $10.5 million against the Chiefs' 2014 salary cap) and he might not be the best fit for a team that requires it's cornerbacks to play so much one-on-one coverage.
It might be a mistake for the Chiefs to give up on Flowers, who turns 28 next month. Flowers has played well in seasons past, and though he's a little guy, but doesn't usually play like one. He's not afraid to stick his nose into the running game.