I always hate to see Chiefs retire, because I'd prefer they come back for depth or a starting job. More competition is always better. That said, I don't see Lilja having a starting job next year, so if he's really a competitor he may not want to be a backup.
In the final seven games of the 2013 season, the Chiefs averaged 34.6 points per game, scored 38 points or more 4 times, and went 2-5. The NFL has ruined the sport.