From Peter Gammons:

Cashman backed off the Mike Cameron deal because Melky Cabrera has improved his plate discipline in winter ball, and there are voices in the organization who still believe Brett Gardner is going to be a useful major league player. No one will argue his energy and intensity, but watch him take batting practice, and you'll find out he's a lot stronger than he looks. Granted, he has to take it into games, but there is something on which to place hope.

Via Tim Dierkes.