Who are you taking in a 4x40? The DBs or the WRs?

For DBs I have Ward, Conley, Hooker, and Lattimore as the fastest group of 4. Maybe Smith if Healthy.

For WRs I have James Clark, Terry McLaurin, Parris Campbell, and Curtis Samuel

I'm going to say that the WRs win more comfortably than expected. 

If all these guy make the combine I see most right around low to mid 4.4 with Clark, Samuel, and Ward as possible 4.3X guys.
 

My Speed Rankings and Guesses for 40 times

Samuel 4.35
Ward     4.37
Clark     4.39
McLaurin   4.40
Campbell   4.41
Lattimore   4.44
Hooker      4.45
Conley       4.46