PITTSFORD, N.Y. -- Amid 10 other players in the Buffalo Bills' offensive huddle for a handful of plays in Thursday's practice was a 300-pound tight end wearing a blue jersey, instead of the offense's customary white.

For the first time in recent memory, Pro Bowl defensive tackle Kyle Williams played some snaps at tight end in what coach Rex Ryan characterized as an attempt to get some more blocking power on the field.

"The tight ends, you know, sometimes can be little babies," Ryan joked after practice. "They’re all upset because ... 'Ah, well you’re putting Kyle in there.' Well, 'cause he can block somebody! So that’s probably the real reason.

"I said, 'Look, outside of [Matthew] Mulligan, I don’t see anybody blocking anybody.' So they were going today, had another word with them or two. But the long touchdown pass by EJ [Manuel], I was impressed by that, the throw was good and all that, but the thing that impressed me was Nick O'Leary blocking the end. He was one-on-one on the defensive end and blocked the heck out of him, so that was ... I more impressed by that."

It's not the first time that a big-name player has seen time on the other side of the ball this training camp. Wide receiver Percy Harvin took some snaps at cornerback on the first day of camp last week.