Biermann has been a defensive end throughout his career, but it is likely he will be asked to play outside linebacker in Buffalo.
The Bills are very thin on the strongside after losing Shaq Lawson (shoulder), Manny Lawson (pec) and IK Enemkpali (knee).
Diagnosed with bipolar disorder last year, Manziel said he was "self-medicating" with alcohol, but he appears to be in a much better place now.
"I am taking medication for bipolar, and I am working to try to make sure I don’t fall back into any type of depression," Manziel said, "because I know where that leads me and I know how slippery a slope that is for me." Manziel has "a lot of confidence" he will be able to stay on the right track, but he admits the road ahead is difficult.
Whitehurst's release, of course, is a strong indication that Kessler will be ready.
Now 34, Whitehurst has been an entertaining NFL presence, but never actually been good at football.
"I don’t know what kind of comeback it will be, but I know I want to get back on a football field, to what brought me so much joy in my life." Manziel has been out of the league since 2015. Whitehurst looked as bad as ever in spot duty on Sunday, and the Browns decided they would rather see what fifth-round rookie Kevin Hogan has to offer if Cody Kessler can't go against the Titans.
He's possibly dealing with an unknown injury, as Biermann is coming off a decent season as a run-stuffing edge defender in Atlanta. An excellent run-stuffer at defensive end, Biermann is a versatile lineman who would fit in well with coach Rex Ryan.
He recorded 2.5 sacks and 51 tackles in 516 snaps with the Falcons last season.
Biermann has the run-stopping skills to do well there.
It's the first we've heard from Biermann since he made a visit to the Bills in March.