We are only two games into the 2015 NFL season but there are three teams who have yet to record a dropped pass. According to Pro Football Focus, the Kansas City Chiefs are one of those teams.
Denver, Green Bay and Kansas City are the only teams without a dropped pass this season.— Pro Football Focus (@PFF) September 25, 2015
There was the Broncos deep pass last week to Emmanuel Sanders that appeared to be a drop but I believe Ron Parker actually knocked it out. So they're not counting that as a drop.
As for the Chiefs, Alex Smith doesn't throw as many risky throws so I can see how this might happen but drops have been an issue for the Chiefs in the past (ahem, Dwayne Bowe).
No drops is a good start for the Chiefs but their receivers need to start producing. Whether that's on those catching the ball, the one passing the ball or the one calling the plays, something has to improve there.