Jesse Johnson/US PresswireJuan CastroThe setup: The long-respected defender played in exactly one game for the Dodgers in 2010, his third separate stint with the team. Nonetheless, in December, Los Angeles re-signed him as a minor-league free agent. He almost retired in March after not making the Opening Day roster, but ended up heading to the minors — where he promptly missed a month with an oblique injury. Still, once he was back on the field, was there any doubt he'd find his way back to Dodger Stadium? On May 13, almost exactly 20 years after the Dodgers signed him as an amateur free agent at age 19, the Dodgers brought Castro up from Albuquerque, sending Ivan De Jesus Jr. down to play in Triple-A regularly.The closeup: Castro helped the Dodgers to two extra-inning wins, on M