With Andre Johnson and Derrick Mason (against KC) taking my first two spots, I've been doing some thinking about the flex.

Roy Williams against the Bucs - got some reps during preseason, but coming off that needless collar-bone injury.
T.O against the Pats - T.O. shows up in big games, but got no reps during preseason, and coming off the toe injury. Also Trent Edwards is "throwing" him the ball.

On a crazy note, I could add Mike Bell ( Saints RB handcuff, with Thomas out and Bush returning from the knee injury ) here, but as it's PPR, so unlikely.