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.San Francisco Giants starting pitcher Tim Hudson delivers during the first inning of a baseball game against the Washington Nationals on Friday, Aug. 22, 2014, in Washington.San Francisco Giants catcher Buster Posey, left, stands at home plate as Washington Nationals' Anthony Rendon scores on an error by second baseman Joe Panik during the first inning of a baseball game on Friday, Aug. 22, 2014, in Washington.Washington Nationals starting pitcher Doug Fister delivers during the first inning of a baseball game against the San Francisco Giants on Friday, Aug. 22, 2014, in Washington.San Francisco Giants' Joe Panik, center, is congratulated by teammates Pablo Sandoval, left, and Michael Morse after hitting a three-run home run during the fourth inning of a baseball game against the Washington Nationals on Friday, Aug. 22, 2014, in Washington.