John Ross was clocked at 4.22 seconds in the 40-yard dash, breaking Chris Johnson's previous record of 4.24.
Ross didn't exactly call his shot Friday, but he did tell those listening that his record-setting sprint was possible.
"Under 4.3 (seconds)," Ross told reporters. "That's what I plan to run."
The NFL confirmed Ross' official time of 4.22 seconds later Saturday.