Great article by Albert Breer on NFL.com. He interviewed Haley about the beard, and his coaching methods. Here's an interesting quote from it:
"First, there was this: Haley made the simple point, after three weeks, that with a win in Week 4, and three wins in each of the three remaining quarters of the season, the Chiefs would be OK.
Second, Kansas City lost the turnover battle 9-2 in the first two weeks. So Haley got the team's photographer and compiled hundreds of examples of poor technique in carrying the ball. And he identified a larger problem within that one -- players trying to do too much, as stars went down and the team fell behind"