"There's a big learning curve, obviously, for any rookie, and the tight end position is one that requires a lot," Lombardi said. "As you look back, if you're self-critical, you might say maybe we asked a little bit too much of him, from that perspective. So I think there's just a volume that he struggled with early, but he was productive and, again, for anybody, the second year's always where you see the biggest jump."