Running back Larry Johnson's injured right foot "has made significant improvement," the Kansas City Chiefs said Thursday. Johnson, who rushed for more than 1,750 yards each of the past two years, was injured in the fourth quarter last week of Kansas City's 33-22 loss to Green Bay. Coaches have said he would almost certainly not play this Sunday against Denver. A Denver television station reported earlier this week that Johnson has a broken foot and is out for the year.