The Yankees are in a transitional period as they try to incorporate a significant amount of young talent into their roster for the first time since their 1996 world championship. Having added Chien-Ming Wang and Robinson Cano last year, they've now begun filling out their pitching staff with the products of their farm system rather than overpaying for the likes of Carl Pavano and Jaret Wright, limiting their free-agent signings to one- and two-year deals.
What that has meant in the short term, however, is a relatively young pitching staff complemented by a deep and powerful (not to mention expensive) offense. In the postseason, however, pitching and defense are somewhat more important than they are during the regular season, because of the higher caliber of competition. The Yankees' pitching and defense are, on paper, the worst of the four AL playoff teams, leaving them reliant on an explosive offense to win playoff games.