The Kansas City Chiefs currently have five offensive linemen under contract for the 2010 season. Free agency starts Thursday at 11:00 PM (CST) but don't worry. Many of the remaining Chiefs without contract are restricted free agents meaning the Chiefs can control their rights (and match any offer those linemen receive).
Two of those guys (Harris and Porter) spent much of the year on the practice squad.
Richardson is an exclusive rights free agent which means he has no negotiating power. He can take the Chiefs offer or not play. That's assuming they'll offer him.
The lone unrestricted free agent is actually an important one -- Wade Smith.
Smith, who will turn 29 at the end of April, has been with the Chiefs since 2008.
Suffice to say, the Chiefs are in prime position to address the position in the NFL Draft. Plus, there will be some, what Scott Pioli calls "natural attrition" with the roster. Take a look at the tackles and guards/centers were on the roster when the season started.
There was some turnover and I expect the same this season. 2009 was the year of the defensive lineman, we'll see if 2010 brings the out the other side of the ball.