The Giants lost to the Padres 7-2 after Yusmeiro Petit and Jose Casilla gave up six runs in the sixth inning. . . . Sergio Romo had a rough spring debut last week, but he struck out two in a scoreless inning Monday. . . . Outfielder Tyler Colvin provided all the offense with a late two-run single. . . . Brandon Belt (stiff neck) sat out the game and the morning workout.