Mariano Rivera does not want to think about pitching this season, but that does not mean he has ruled out the possibility. The Yankees closer was optimistic in an interview with ESPN Radio yesterday, and continues to have his eyes on a potential September return. "That's my goal," Rivera said when asked about a Post column by Joel Sherman, in which Rivera's rehab doctor said he believed he could return to this season. "Definitely, that's my goal. I'm not thinking about it because if it doesn't happen, I'd be disappointed. So, I'm taking it day by day. I'm working hard, I don't want to put something in my mind. I want to make sure I do my things first. Focused, optimism, confidence.