According to two sources who spoke on the condition of anonymity, the Dodgers agreed in principle earlier today on a minor-league contract for free-agent infielder Marcus Giles, who had a really good spring for Colorado but ultimately was released last week because the Rockies didn’t have a spot for him. The plan was for Giles to go to Las Vegas, reacquaint himself with 3B, where he has just nine career appearances and none since 2005, prove that he could play there for about 10 days, then get called up and share time with Blake DeWitt until Nomar or Abreu comes back. … And then, as Giles was in his car driving to Las Vegas from his home near San Diego, HE CHANGED HIS MIND. Just decided he wasn’t coming. Turned the car around and went home. … And the worst part is, the Dodgers passed on two other players they could have signed because they were convinced they had Giles, and neither of those players is still available. One of them is believed to have been Alex Cintron, a free-agent infielder who signed a minor-league deal with Baltimore yesterday. … It still isn’t clear why Giles changed his mind, other than one source saying he just doesn’t have the desire to play anymore. At any rate, his indecision has left the Dodgers back at square one, at least for the time being.