The Yankees could consider changes to their $1.5 billion stadium if home runs continue to fly out of the new park. Back in 2004, the Phillies opened Citizens Bank Park, which became a paradise for home run hitters. The club raised the left-field fence and moved it back after the 2005 season. If the Yankees are considering changes already, less than halfway through the park's first season, they aren't letting on. "It's not something I?m even thinking about," said Yankee GM Brian Cashman. "Most of the home runs are launched, so I don't know. We can't move the subway line."