After taking their first loss on the field last week, the Indianapolis Colts absorbed one off the field ahead of a Sunday home game against the Las Vegas Raiders. Las Vegas (1-3) comes into town after a bitter 25-24 home defeat last week against Chicago. Las Vegas then had a chance to win it, but Daniel Carlson’s 54-yard field-goal attempt was blocked with 33 seconds remaining. “He isn’t backing away from anything,” first-year Las Vegas coach Pete Carroll said. Las Vegas wide receiver Justin Shorter (illness) did not participate in the Wednesday session.