Herron signed on Tuesday after being one of several running backs to work out try out for the job at the team’s facility.
Speaking on his weekly radio show on WGR-AM, Whaley said Williams was tested for a concussion on Monday after he complained of not feeling well following the game.
LeSean McCoy has battled a hamstring ailment all season, and now backup Karlos Williams has his own injury issue. He was bottled up for the most part against the Giants with just 40 yards on 18 carries, but he did catch three passes for 30 yards, including a touchdown. Herron essentially relieved Richardson of his duties, after the Colts traded a first-round draft pick to the Cleveland Browns to acquire him back in 2013.
As we mentioned this morning, among Buffalo’s healthy players, quarterback Tyrod Taylor (111 yards) and wide receiver Percy Harvin (32 yards) are the team’s leading rushers heading into Sunday’s road game with the Titans.
In order to make room for Herron on the 53-man roster, the Bills placed tight end MarQueis Gray on Injured Reserve, bringing his 2015 campaign to a close after just four games.
Cierre Wood was promoted from the practice squad last week.
A person familiar with the situation told The Associated Press that Richardson and Smith also worked out for the Bills. Richardson was eventually cut by the Raiders, and for all intents and purposes it seemed as though his National Football League life was over before he got another workout this week with the Bills.