This is from Rotoworld
"Fernandez was signed for a $200,000 bonus out of Cuba last January and went on to bat .306/.367/.496 with 16 home runs and 65 RBI in 93 games between Double-A Tulsa and Triple-A Oklahoma City, but he basically disappeared in late July. There are no stats on the record for him after July 29. We'd guess there's a lot more to the story here, but the Dodgers haven't released any details."
It's not often you release a player simply because he went MIA. I mean...if we could find him - it looks like the guy can hit!