Yankee Stadium saw a record-number of home runs leave the park in 2009, but so far this season the rate of homers has dropped. "I'm not that smart," shortstop Derek Jeter said. "I'm not going to figure out wind patterns and tunnels. There are people who study that?" In New York's first six home games this season, there were just 13 homers, compared to 25 at the same point in 2009. The weather, the wind, the destruction of the old Yankee Stadium next door are potential reasons. "I know the first six games it didn't carry like it did last year," manager Joe Girardi said. "That's the only difference I felt. It seemed last year, it turned around, around May 15th. It played like the old Yankee Stadium."