The Washington Nationals' winning streak ended at a team record-tying 10 games Friday night when rookie Joe Panik hit his first major league home run and sent the San Francisco Giants to a 10-3 romp. Tim Hudson and four relievers quieted bats of the Nationals, who apparently don't have an inexhaustible supply of comeback wins and last-at-bat heroics. Javier Lopez, Jean Machi, Sergio Romo and Juan Gutierrez finished the job for the Giants, who have won six of eight. The Nationals' winning run had become suspense baseball theater at its best, always with a happy ending for the team in red and white.