Kansas City, Mo. ? The ball is spinning through the air and heading straight to Dwayne Bowe, who has gotten open in the end zone. Bowe goes up. The ball comes down.

Indianapolis defensive end Dwight Freeney, right, hits Kansas City quarterback Matt Cassel as he follows through on a pass Sunday in Indianapolis.

All he has to do is catch Matt Cassel’s pass and the Kansas City Chiefs have a 13-9 lead in the third quarter at Indianapolis.

But he drops it. Then he drops another ball on the next play.

The Chiefs (3-1) had to settle for a field goal after Jon McGraw’s interception of Peyton Manning set them up on the Indianapolis 30. And in the end, they lost to the ragged, injury-weakened Colts, 19-9, on Sunday, their first loss of the season.

Back in Kansas City, fans are furious with the former LSU star, just as they have been in the past when he dropped passes or onside kicks in a career that’s never taken flight since he was a first-round draft pick in 2007.

There’s no way to know if the Chiefs would have beaten the Colts had Bowe caught the TD pass. But it would have given them their first lead of the game and possibly changed the entire complexion of a game in which Manning and the favored Colts were struggling.

But without doubt, it would have taken some heat off a quarterback who is also sinking deeper into the fans’ doghouse. Cassel will head into Sunday’s game at Houston tied for 27th among NFL quarterbacks in total passing yards. His passer rating of 74.0 is 25th and in spite of the fact Kansas City is 3-1 and leading the AFC West, people are calling for both the quarterback and the inconsistent wide receiver to be replaced.

Their calls are not likely to be answered. Coach Todd Haley spent most of his Monday media session stoutly defending both, insisting that Cassel and Bowe, just like the entire team, are on the upswing and getting better.

“Our quarterback played a smart football game, led the team in the fashion he will have to lead it,” Haley said. “No. 1, we’re 3-1 in the first quarter of the season, which is exactly what we want, or what we will go into the next quarter feeling good about.

“Can he be more efficient? Absolutely. But his arrow is without a doubt pointing up. This guy is making progress.”

Cassel’s stats are not all bad. He’s been sacked only three times in four games, which indicates improved play by the offensive line but also points toward his correcting a career-long tendency to hold onto the ball too long. Plus, he’s thrown only three interceptions in four games. Against the Rams, he missed some open receivers as well as had a couple of passes dropped while completing 16 of 29 for 156 yards.