Hate to say this, but when you make 3 errors in a game and you have been playing baseball since you were 5 and you need someone to say hay you sucked last game and you need to take some extra ground balls. The type of leadership you speak of should be the coach telling the player that stuff. As, for the yankees atleast half of there team is 30 or over. Jeter, Damon, Giambi, Matsui, Abreau, pitchers Riveria, Pettite, Mussina, they do have some young guns, but if thats not enough leadership to make them win, I dont know what is. One last note if you have a kid throwing 93 in bullpen or you have a kid that can hit 10 hrs in practice and they cant do it in a game. Leadership wont help that. The only thing that can cure that is Boys town lol.