After my last two mock drafts looking into the possibility of both trading up and trading down, this will be a mock draft without trades. This is going to be an exercise to see which prospects are available at the Buffalo Bills original selections in the 2021 NFL Draft. For clarity purposes, I will be drafting this mock draft with the assumption that the Bills let all their free agents walk with the exception of Daryl Williams, Andre Smith, Levi Wallace, and Ike Boettger. With these being the only players the Bills elect to re-sign for this hypothetical mock draft scenario, the position of highest need is most likely linebacker. Without a linebacker in this draft, the Bills are looking at a three-headed competition between Andre Smith, Tyrel Dodson, and A.J. Klein to replace the contributions of Matt Milano.