2 – Feliciano and Long man the pivot

The news about Mitch Morse's core muscle injury that required surgery a few weeks ago, coupled with the fact that Russell Bodine isn't ready to return from offseason shoulder surgery has left a sizable gap in Buffalo's depth chart at center.

But this is where the position flexibility that GM Brandon Beane and his personnel department strive to acquire becomes critical.

Manning the center spot for the starting unit on Tuesday in practice was free agent signee Jon Feliciano. Feliciano was signed primarily to play the guard position for the Bills, but he has a wealth of experience in the pivot.

"I was the primary backup center the last four years in Oakland," Feliciano told Buffalobills.com. "I'm very comfortable there, but I'm only place holding until Mitch (Morse) gets back."

Feliciano and Spencer Long are alternating days at the center spot. Long played center last year for the Jets.

Both Feliciano and Long have also lined up at left and right guard in OTAs. So too as guard Quinton Spain.

Though some might see all that juggling as disruptive, Feliciano believes it will make them a more resilient unit once they reach the regular season.

"I think it's actually a benefit with us switching positions," he said. "Quinton Spain is playing left and right guard. Me and Spence are playing left and right guard. It's a benefit because we're getting to work with other tackles and other guards. It's going to help us come together quicker."

Feliciano has been part of offensive lines with good position flexibility before. His Oakland line despite heavy shuffling only gave up 18 sacks in 2017 to finish third-best in the league.

He feels they can have similar success due to the position flexibility in Buffalo.

"Spence and I have both played different positions and when you have guys like that you don't miss a beat," Feliciano said. "It's nothing for me to play the left or right side or go to center and I know Spence feels the same way."

In terms of other roles on the line, Ty Nsekhe was the starting right tackle opposite Dion Dawkins on the left. Spencer Long and Quinton Spain were the starting guards with Feliciano in the middle.