Eric Gagn? says he's upbeat and positive, and claims he has no regrets about accepting a trade to the Red Sox despite his rough start. "At this point in my career, I've proven that I can close games," Gagn? said yesterday. "I've proven that I can perform at a high level, but the chance to get to a World Series is what attracted me to this team. "I know things have started out rough, but I'm not looking back. I did what I did because I believe this team can win the World Series and you don't get that chance too often in your career. So I'm just here trying to help Jonathan Papelbon out. I wish I'd have started better but hopefully things will get better."