The good news is that it doesn't appear that trend has continued with CB Brandon Flowers, who went down clutching his knee after picking off a QB Philip Rivers pass in yesterday's 20-17 loss to the San Diego Chargers. Kent Babb of the KC Star later reported it was an ankle, not a knee, injury.
The bad news is that Nick Wright of 610 Sports follows it up this morning reporting that Flowers' injury is a high ankle sprain.
A high ankle sprain can cost a player several weeks of action, depending on the severity. As a reference, a high ankle sprain cost Dexter McCluster five weeks of action last year. It could be a couple weeks or it could be more than a month. It just depends on the degree of the sprain and Flowers' ability to come back from it.
It's not a season-ending injury but it's one that will likely cost Flowers some time.