I don't think it's a foregone conclusion that they'd move Cozart to make way for Didi. Id Didi hits, they may prefer him to Cozart as a 3B. He's got the arm for the spot.If someone is saying he won't stick at shortstop they haven't seen him play or believe he will move elsewhere for someone else.
"Baseball is a very, very complex business. It's more of a people business than most businesses." - Bob Castellini
In the meantime, I would continue to play both DiDi and Hamilton at SS on their respective teams in order to maintain optionality.
"You can learn little from victory. You can learn everything from defeat."
-- Christy Matthewson
"Show me a good loser and I'll show you an idiot."
-- Leo Durocher
Gregorius could play 2B also, but he will presumably big league ready before 2015, so he may have to backup for a while unless he moves to 3B (or is traded).
I just can't see Gregorius having value at the major league level at any position other than SS.
"Man, the pitch looks fast, even in slow motion." Thom Brennaman on Chapman's fastball.