Andy Pettitte was a rock on the mound in his latest gritty performance. Mariano Rivera jogged in from the bullpen to nail down a ninth-inning lead. After two straight duds to start the season, the banged-up New York Yankees finally looked like themselves Thursday night. Pettitte pitched the Yankees to their first win of the year and Rivera made a successful return to the mound in New York's 4-2 victory over the Boston Red Sox.