It's called specualtion and is every bit as valid, more so, than speculating about Giambi, who may be the most tested player in MLB history. Also, Giambi is getting over a tumor removal and treatment. Which is alot more sever than a simple staph infection which is treated by antibiotics.
Let's not forget the unfortunately death of an Orioles minor league pitcher, Steve Bechler. I believe the Orioles are being sued, or soon will be, over his involvement with performance enhancing drugs.