It appears the Kansas City Chiefs are just playing it safe with Jamaal Charles. The running back's foot strain won't cause him to miss a serious amount of time, and he's considered day-to-day, according to several reports.
Charles did not practice Tuesday, but all the indicators are positive: there's no injury to his Lisfranc, his X-rays turned up negative, and he's not limping, wearing a boot or a cast. Two orthopedists reviewed the injury and said there's nothing structurally wrong, and he could be back in pads by Wednesday. There's no word on his status for Friday's preseason game against San Francisco, but the Chiefs would be well within their rights to keep him out of the game for precautionary reasons.
SB Nation's Chiefs blog Arrowhead Pride has been on top of the injury suffered Monday, which caused the running back to be carted off the field. However, the "carted off" bit was somewhat of a false scare. All players are carted off the field at Chiefs training camp, because otherwise they'd have to walk up a big hill to get to the training center, so it's not an indicator of serious injury as it is at other camps.
If anything, Charles' injury highlights his importance to the Chiefs. After averaging 5.3 yards per carry in 2012, there's no doubt he's the squad's best player. And his backup is third-round pick Knile Davis, a player Arrowhead Pride was not particularly optimistic about. And after that is Shaun Draughn, who worked his way into a backup role last season after being on the practice squad in 2011, but is by no means someone who should be getting a ton of carries at the NFL level at this point in his career. It's too early to tell if Alex Smith and Andy Reid are on the same page, so Charles' health is of utmost importance if they want to have any semblance of an effective offense in 2013.