It seems that Raheem Moore may walk so the Broncos will need a FS to pair with Ward. Holliman is a ball-hawking FS who has been compared to Ed Reed. Holliman had 14 interceptions this year which shows his instincts and ability to be in right place at the right time.
I know that Landon Collins will be the first safety taken in this draft class, but Prewitt looks like he could make for a decade long NFL starting free safety. He's got great football IQ, good awareness, is a smart tackler, and looks the part of a center fielder or a deep zone center.
I think they'll lose Rahim Moore and will need to have a future replacement. I don't think he'll start right away but he'll get it eventually. He's a playmaker who could allow Ward to go play in the trenches. I like the fit here with the scheme and with Ward
Rex Ryan talks about being a defensive bully, so I have a feeling he will go after a good safety here, since Buffalo could lose their starting free safety to free agency for the second consecutive offseason.
I like Chris Hackett. He can come up and play the run and wrap up the running back with a solid tackle; sometimes he'll tackle the ball carrier behind the line of scrimmage. He also is pretty good in deep coverage. I think Hackett could start immediately in the NFL, but he still might require some adjustments