I say Billy Beane, he trades his great players away for so many prospects, and then he goes out and gets Matt Holliday and these excellent players for the prospects he got from great players.
I agree with you Billy Beane always puts together a competitive team who can win, even though he trades almost all the all-stars he has. I wonder if they will trade Holliday during the year to get a better deal, or sign him long-term.