Continuing a position-by-position preview of next month's draft from a Buffalo Bills perspective:

Position: Cornerback

Current personnel: Stephon Gilmore (signed through 2015), Leodis McKelvin (2016), Corey Graham (2017), Nickell Robey (2015), Ron Brooks (2015), Brandon Smith (2015), Mario Butler (2015)

Draft need: Low

State of the position: Four of the Bills' 19 pre-draft visits have been cornerbacks, tied for the most of any position. That's slightly surprising, as the Bills have a young core of players already in place at the position. Gilmore's wrist injury knocked him off track last season, but with continued development he could be one of the NFL's better cornerbacks. McKelvin is coming off a career season, while Robey was a steal as an undrafted free agent last spring.

One wild card is Graham, who coach Doug Marrone hinted at the owners meetings could be tried at safety. But even if Graham shifts to the back end, he could move back to cornerback in case of injury. That lessens the need to draft a cornerback. The other wild card is Robey, who is undersized and may be viewed differently by Jim Schwartz than he was by Mike Pettine. If Robey takes a step back, then the Bills could use some help at cornerback. But it's hardly a pressing need.

One name that could work in Buffalo? Oklahoma's Aaron Colvin, who was projected to be an early-round pick before he tore his ACL during a Senior Bowl practice in January. He won't be ready for the start of this season and could be available later in the draft. If there's a player to draft and stash on PUP or injured reserve, Colvin could be it.

Sweet spot: Mid-to-late rounds

Possible targets: Ross Cockrell (Duke), Walt Aikens (Liberty), Aaron Colvin (Oklahoma)