I don't think they'd have Sapp break and sit on the bench. He's not on the 40 and you're already going to have to make room on it if Willis breaks and if Hermida breaks (doubt he will)
Here's how I see it
Hernandez,
Votto
Phillips
Rolen
Janish
Gomes
Stubbs
Bruce
Cairo
Hanigan
Renteria
Lewis
Heisey
Volquez
Arroyo
Cueto
Wood
Bailey
Arredono
Burton
Ondrusek
Bray
Masset
Chapman
Cordero
The only thing I think could change is if Bray starts to struggle and Willis continues to shine. Actually, I'd prefer Willis over Bray but I doubt that happens unless something drastically occurs.