Furcal and Castro will be up for it. Tulo needs to get his **** together. Hopefully he's not hurt
Oh, no doubt Castro is probably gonna start simply based on the fact he's a Cub and he'll get tons of votes.
The back up and maybe "3rd stringer" (if Larussa takes 3 shortstops) is gonna be between Furcal, Tulo and maybe Jose Reyes. Not saying Tulo deserves to go. The 8 errors alone show he doesn't deserve it. But rep counts for this stuff and he's got a better rep than the others.
Tulo should stay at short. That's just crazy to move him. While he's had some errors, he is the active #1 leader (career) in Range Factor and Fielding % at the SS position and top 3 in almost every other meaningful category.
He'll come around. For as many errors as Tulo's made, he's made about 5x as many plays that an average shortstop would not even get to.