He saw his first game action against San Diego on October 25th and appeared in every game since. He was signed the day after the Chiefs traded Tank Tyler to the Carolina Panthers.
This means that there is one spot open on the 53 man roster, which will undoubtedly be filled by tomorrow morning's practice.
I imagine another nose tackle being signed in Smith's place is a strong possibility because the Chiefs are currently sportin' just one on the roster and Ron Edwards is no spring chicken.
One option is promoting Derek Lokey from the practice squad. Lokey spent training camp with the Chiefs before being released only to be re-signed last week.
There also remains one open spot on the practice squad.