‘The Bills’ return their starting guards and center in Quinton Spain, Jon Feliciano and Mitch Morse. The Bills this month showed they value the versatility of veteran Spencer Long by picking up the option on his contract. Long, who has started 44 NFL games, can back up at both center and guard. Ike Boettger, who spent last season on the 53-man roster, is back for his third pro season. Ryan Bates is a backup tackle, but he can play guard, too. Tackle is much more of a need for the Bills.’