I was able to drop players using the add/drop function. I hit control + players to drop them all at the same time. I believe Juan said that as long as you mark your keepers, he's going to drop anyone who isn't marked, so if you are having trouble, he can do them all at one time on the morning of the 15th. Speaking of Juan, I was just looking over his team. He's got a pretty good corps of players he's keeping this offseason. I still get this warning when I go through the add/drop function: I have indeed marked my keepers, so that's good. i get that same message.