Mora says it will be a game-time decision whether Edgerrin James plays. The running back has practiced only twice since signing a one-year contract on Tuesday. Julius Jones and second-year man Justin Forsett figured to get most of the carries.
Seattle has won its first two exhibition games. KC is 0-2.
Rookie linebacker Aaron Curry, the overall No. 4 pick last spring, was expected to play after missing last week with a groin strain.