Chiefs back-to-work FYI

Readiness factor: The Chiefs are in pretty good shape. They didn’t have many major changes. New offensive coordinator Bill Muir was on the staff last year, and big pockets of players worked out together on a few occasions. I don’t think there will be any major obstacles to this team getting rolling quickly.

Biggest challenge: Quarterback Matt Cassel's progression is vital for this team. He made great progress last season, but he stalled in the Chiefs' final two games after offensive coordinator Charlie Weis announced he was leaving for the University of Florida. New quarterbacks coach Jim Zorn is charged with working with Cassel. The two have met briefly, but they will have to get on the same page quickly to ensure Cassel can continue to lead the offense effectively.

Getting rookies ready: The Chiefs are excited about their draft class. Players such as receiver Jon Baldwin, center/guard Rodney Hudson and front-seven defenders Justin Houston and Allen Bailey have a chance to play right away. They must get up to speed without the benefit of an offseason program.

Key players without contracts for 2011: Center Casey Wiegmann.