Buffalo GM Doug Whaley announced the team signed Williams to a contract extension which is reportedly for four years and worth $26 million.
"Aaron Williams is a versatile player who has grown into a key playmaker for our defense in recent years," Whaley said. "He had an extremely productive season for our defense in 2013. Aaron is the type of young, core player we targeted early in the process to retain for years to come and this will be our philosophy moving forward. By building on his improved play in 2013, we expect Aaron to continue to grow into a key contributor for the Bills organization."
Williams, drafted with the No. 34 overall pick out of Texas in the 2011 NFL Draft, is a converted cornerback who stepped up his game as a safety for the Bills last year.
He recorded four interceptions, a forced fumble and 11 pass deflections and can move around the field for Buffalo.
More than likely, he'll be slotting into Byrd's role in 2014, though. The Bills can talk about working out a deal with Byrd all they want, but too much time's passed for him not to hit the free-agent market.
We'll find out if Williams is capable of filling that role on a full-time basis.