KANSAS CITY, Mo. -- Knile Davis was back to his old habits in Sunday's 34-15 win against the Miami Dolphins. Davis had a big game while replacing the injured Jamaal Charles, rushing for a career-high 132 yards and a touchdown. But his performance was marred by a couple of fumbles, one of which happened at a most inexcusable time, with the Kansas City Chiefs trying to kill the clock in the fourth quarter.

Chiefs coach Andy Reid didn't seem troubled by these developments, at least not publicly.

"The crazy part of that is that both of them were high and tight," Reid said. "We always talk about that, keeping leverage on the ball. One of them he probably should have put that second hand on it in traffic. The second was kind of a fluke deal. I really don't worry much about him in that area. You saw we came right back to him. It wasn't like we sat him down."

I might be willing to, like Reid, dismiss Davis' fumbles as just a one-time thing. Except they aren't.

Davis came to the Chiefs last season as a rookie from Arkansas with an extreme fumbling problem. He's better at it now than he was last season, but as we could see for ourselves on Sunday, he isn't cured.

Davis is one of three NFL running backs with three fumbles this season, though the Chiefs have lost just one of them.

"You get comfortable," Davis said. "You don't see what's around you. Things happen, you know, but you've got to keep two hands on the ball at all times."

I like Davis as a runner. At 227 pounds, he's much bigger and more powerful than Charles. We saw that, too, against the Dolphins. He might be as fast as Charles, and he's a big-play threat.

But he's not a complete player. The Chiefs are a better team when they pass the ball with Davis on the bench.

Then there's the fumbling problem. The Chiefs can't truly trust Davis until he fixes it once and for all.