New York Mets reliever Dae-Sung Koo has been placed on the 15-day disabled list after an MRI revealed he had been pitching with a bruised rotator cuff in his left shoulder since his famous dive to home plate against the Yankees on May 21. "I have no regrets about what I did that day," the left-hander said. "I was doing whatever I could that would help my team win and that's the most important thing right now. I would do it again if I needed to, but you can't look ahead and say, 'Man, I wish I had never done that.'"