"He's a big guy. For those guys to be able to be efficient on the outside and be able to drop their body and hips and get out on efficient angles – we've got some work to do there," Undlin said of Douglas at the end of the Eagles' spring work. "He's getting better. … We've spent a lot of time with that. … Arms control your feet. He's got long arms; he's got long legs. This part up here is what we're trying to get right. Keep this in here and not out there – they go out here; the feet go out there.