Update: The Bills have now confirmed that Donnie Henderson will not be back in 2016, nor will special teams assistant Michael Hamlin.
The #Bills announce that DBs coach Donnie Henderson & Spec. Tms quality control coach Mike Hamlin won't return in 2016.— Chris Brown (@ChrisBrownBills) January 12, 2016
Original story: Alex Marvez of FOXSports.com reports that Buffalo Bills defensive backs coach Donnie Henderson will not be back with the team in 2016. He also reports that he has already interviewed for a job with the Indianapolis Colts.
Source tells @NFLonFOX that @buffalobills DBs coach Donnie Henderson won't be back. Possibility current Bills DC Dennis Thurman handles DBs— Alex Marvez (@alexmarvez) January 12, 2016
In his report, Marvez points out that Bills defensive coordinator Dennis Thurman, who has a background coaching defensive backs, could assume responsibility of that positional group with Henderson leaving. The Bills also employ former NFL safety Tim McDonald as a defensive backs coach, as well.
Thurman's role as the defensive coordinator has not changed, but was left in doubt by Monday's hiring of Rob Ryan, Rex Ryan's twin brother, as Assistant Head Coach/Defense.
Source confirms to @NFLonFOX that @buffalobills DC Dennis Thurman expected to work more with DBs now while Rex/Rob Ryan run the defense.— Alex Marvez (@alexmarvez) January 12, 2016
Henderson, 58, has been widely regarded as one of the Bills' best positional coaches for the past three years after joining Doug Marrone's coaching staff in 2013. In that time, the Bills have been able to develop players like Duke Williams (the 2014 version, anyway), Bacarri Rambo, and most notably Ronald Darby into early contributors, while others like Stephon Gilmore have taken their game to new heights.
No changes to the Bills' defensive coaching staff are yet official - aside from the Rob Ryan hire - but it seems pretty clear at this point that more shuffling is on the way.