If Garner is that fast, he is in some very elite company. Here are the fastest NFL'ers ever clocked.
Fastest 40 Yard Times (NFL Combine Records)
4.24 - Rondel Melendez, (WR), Eastern Kentucky - 1999
4.28 - Jerome Mathis, (WR), Hampton - 2005
4.28 - *Champ Bailey, (CB), Georgia - 1999
4.29 - Stanford Routt, (CB), Houston - 2005
4.29 - Jay Hinton, (RB), Morgan State - 1999
4.29 - *Fabian Washington, (CB), Nebraska - 2005
4.30 - Yamon Figurs (WR), Kansas State - 2007
4.30 - Darrent Williams, (CB), Oklahoma State - 2005
4.31 - *Johnathan Joseph, (CB), South Carolina - 2006
4.31 - Aaron Lockett, (WR), Kansas State - 2002