This is a very tough list to quantify but here is my best shot:)
http://www.ranker.com/list/fastest-nba-players-in-2013/veggamattic,
Aaron Brooks
May be the quickest with the ball...like a waterbug!
Derrick Rose
Also explosive and had to be added even with the injury!
LeBron James
Ridiculous track down speed and easily the fastest for his size!!!
Tony Parker
Tested fastest by unproven NBA electronic tracking gear...was faster!
Tywon Lawson
Deceptively fast!
Russell Westbrook
Explosive!
John Wall
Crazy speed with the ball!
Eric Bledsoe
Fast with quick reflexes and so strong for his size!
Avery Bradley
Team say he is faster than Rondo and an amazing defender due to his speed!
Norris Cole
With the ball and as a defender!