Sosa forced the trade, plain and simple. Everyone in baseball knew that he couldn't go back to the Cubs. Plus, he had gone down in BA, HR's, & RBI's for three consecutive seasons, something not done in over 20 years. (I believe that Kevin McReynolds was the last to do this, in the early nineties) Throw in the incredibly overpaid salary and the whispers about steroids and you have a player nearly impossible to deal. Even though Hendry kept up a brave face, saying that he expected Sammy back and Sammy to rebound, yadda, yadda, everyone knew he couldn't bring him back. They were lucky to get anything in return at all.