I wanted Stallworth more than Rogers
There's a lot of risks with the trade... Stallworth has a history with that hamstring of his, and Rogers himself wasn't Mr. Durable last season. Even if he does play 16 games, there's no guarantee he'll put up more than 600-700 yards and 6 TDs or something. Sure he's good, but Detroit's offense as a whole isn't.
And to be honest, I had 3 TEs, so I could risk letting one go (even as high of a calibre player as Winslow), and I needed the WRs more than the D anyways, so I'm not too upset with the trade. Of course, Springs didn't hurt matters any.