Getty Brian Cashman All would seem to be well with the New York Yankees. At 12-7 after their first 19 games, the defending American League pennant-holders sit atop the AL East Division, tied for the best record in the league with the Texas Rangers and best record in baseball outside of the National League West (where three teams have better records). But the Yankees are not exactly cruising toward another World Series appearance. The Bronx Bombers have been overly reliant on their offense —