Lockett will be fortunate to be drafted by the end of day 2
How many 5'7" WRs have ever been drafted in the first round?
The best comps I could think of for Lockett in the last 3 drafts are TY Hilton (5'10, #92 in '12), Tavon Austin (5'8, #8 in '13), and Brandin Cooks (5'10, #20 in '14).
If Lockett can run a sub-4.4 40 like those 3 guys he'll be drafted in the first 3 rounds. Hilton didn't go as high as the other two because he played at FIU and didn't play the same type of competition.