Rooney's not a number 9 though, it's his job to get involved in build-up play. He's Utd's spark. And Drogba does it, that's true. But then again, it's something that's part of your game/inside of you and not something you can just do. The likes of Trezeguet, Inzaghi, Ronaldo etc. hardly played a part in build-up play as well.