The last time the Chargers had a big win on the road, they returned home to a blackout. Thousands of tickets must be sold for this time to be different. About 3,000 general tickets are available for a Dec. 22 game against the Raiders, a team spokesman said. A week later, the season finale versus the Chiefs is in more danger of going unseen on local television, as nearly 8,000 general tickets are unsold. San Diego won in Kansas City last month. Its next game versus the Bengals was blacked out, the only NFL blackout this year.