It's quite different. He was in his 30s and really bad fielding the position. He also spent most of his time not playing SS before then. Castro is much younger has almost exclusively played SS and presumably will be quite good at it at the time of a move possibly happening. They are not similar situations. Young had to move, and it was convenient they had a guy to fill the spot. Castro should not have to move. i love this narrative. like the Rangers approached Young and said "you're really terrible at fielding, guy" and he's all like "i had no idea, tell me what i must do!"