Sluggo,

You didn't have to drop DeRosa to pick up Wilson. You get 6 bench players and players in your 3 DL spots don't count against your limit. I'll change it so you have both DeRosa and Wilson if you want. You can keep DeRosa in an DL spot as long as you want, but if you want to activate him (once he's off the DL) you'll have to drop another player first.

By the way, you don't have to add/drop players to be active. At a minimum you should be checking in on your roster every day or two and making sure your players are all playing, and moving them to the bench (or DL) if they get hurt.

I check my roster every morning when I can. It takes 5 minutes. I make sure any starters that are pitching that day are in my starting lineup, unless I don't like the matchup. You can tell the starters that are pitching that day because they'll have a ^ by their opponent for that day. I have 6 or 7 batters I play every day, and then 1 or 2 that I rotate in and out of the lineup depending on how hot they are lately, who is the pitcher they face that day, if they suck on the road or against lefties, and so on. It sounds complicated but once you figure out a strategy, it really only takes a few minutes.