One thing I appreciate about NFL Draft Buzz is that they provide estimated forty times for almost all prospects. I wouldn't take them to the bank as predictors of combine times but until we get to the combine, it's useful to have some sort of guide to speed for certain positions and CB is definitely one of those positions. So here are the sub 4.40 corners according to NFL Draft Buzz and some times for notable prospects we like.
1. Gentry Williams, Georgia - 4.29
2. Kayin Lee, Tennessee - 4.30
2. Elliott Washington, Clemson - 4.30
4. Zabien Brown, Alabama - 4.34
5. Chris Peal, Syracuse - 4.35
6. Boo Carter, Colorado (fmrly Tennessee) - 4.37
7. Jamari Sharpe, Indiana - 4.38
7. Jyaire Hill, Michigan - 4.38
7. Eli Bowen, Oklahoma - 4.38
7. Jermaine Matthews, Ohio State - 4.38
7. Dezz Ricks, Texas A&M - 4.38
Other notables:
Ellis Robinson, Georgia - 4.48
Brice Pollock, Texas Tech - 4.44
Kelley Jones, Miss St - 4.42
Ashton Hampton, Clemson - 4.43
Zach Lutmer, Iowa - 4.44
AJ Harris, Indiana - 4.45
OJ Frederique, Miami - 4.42
Edit: Not from the same source so lacks consistency but Evan Johnson of BYU might be the fastest. He's reportedly run a 4.27 forty.
Sadly Demello Jones isn't listed on NFL Draft Buzz
If the above holds true, it's a fast bunch. Based upon this alone, stock up for Zabien Brown and Chris Peal. However, it should be noted that our draft pick at that position, Karon Prunty ran a 4.45 so the importance of speed is debatable.