Padres pitcher Sean O'Sullivan turned in a decent outing in his season debut but was pegged with the loss Friday night against the Giants.

O'Sullivan (0-1), who hadn't pitched in the majors since 2011, allowed a sacrifice fly in the third and a run-scoring double to Pablo Sandoval in fifth for his only damage of the night. The right-hander permitted two runs on six hits and three walks while striking out four over five innings in a 10-1 defeat.