I don't think there's a salary cap in baseball. That's why the A's can't compete with the yankees. If you haven't seen it yet, watch Moneyball. It's a classic.
We have spent a lot of money on our own players. I didn't take it to mean just spending money in free agency.
We stopped doing that after Brandon Carr burned us (pun intended) but we used to go after some pretty big names in the past. Deion, Leroy Glover, Rocket Ismail, Marco Rivera, Ken Hamlin, Ryan McNeil, Anthony Henry, Greg Hardy.
We've drafted well over the years and we don't let our players sign elsewhere. Randall Godfrey is the last one I can remember. The extensions we've handed out are in the high hundreds of millions.