According to JP, they had two guys targetted - RR and Troy Tulowitzki, a SS out of Long Beach State. Glad that RR was available, cuz with Adams and Hill already on the roster, they may not have needed a young SS.
Also sounds like RR will be signable (they passed on other highly-ranked pitchers who are Boras clients).
According to RR:
"I want to get a deal as soon as possible," said Romero, who has never been to Canada. "I just want to be out there facing hitters, competing. That's what I love to do. I want to try to be in the big leagues as soon as possible."