2015 NFL Combine: 5 DB prospects to know, 5 to watch for Arizona Cardinals

When it comes to the need in the secondary for the Arizona Cardinals, they have aggressively and effectively addressed it in the last two drafts, but maybe more than any other position, Steve Keim's work is never done.

Antonio Cromartie may be on his way out, while Jerraud Powers is in his final year of his contract. When you look at the Cardinals depth chart, the secondary could probably use one corner for 2015, but it might need two in 2016 and maybe even a safety, so Tyrann Mathieu will not have to be used in only one role.

The reality is you can never have enough good cornerbacks, and that means finding developmental players on day three.

Here are five DBS to know at the NFL Scouting Combine:

Alex Carter, CB Stanford:  He's the prototype Stanford corner, with good size, a physical style of play and a good understanding of what his assignments are, but he looks tight as an athlete. Does he have the quickness to be more than a fourth corner? Will he have to make a transition to safety?

Byron Jones, CB UConn: The Huskies have produced a bevy of talent corners the last several years, and Jones is another in that line. He has the size and strength to handle bigger receivers, but, like Carter plays better when in zone coverage. Is he a quick twitch athlete?

Kevin Johnson, CB Wake Forest: While the first two had questions about their ability in man, Johnson is a silky smooth cover corner with good feet and the length that is needed to combat the bigger NFL receivers. He's thin, though, and has had issues with pass interference penalties. How big can he be, and will that slight frame limit him?

Durrell Eskridge, S Syracuse: A surprise early entrant, Eskridge looks like an NFL safety, but he has not shown up enough on the film to warrant an early pick. If he shows the athleticism to go with his size, then he'll be the perfect developmental type of pick late.

Jaquiski Tartt, S Samford: The size/speed combo could have NFL teams drooling, but he plays wild at times and gets caught cheating too often. He's a small school player that has a ton of untapped potential, but can he harness it and be more than a downhill safety?

Here are five other players to watch:

Chris Hackett, S TCU

Detrick Bonner, S Virginia Tech

Jacoby Glenn, CB UCF

Craig Mager, CB Texas St

Tye Smith, CB Towson