NFL Sports editorial source review ·
Tyreek Hill: 40 yard time and speed evidence
The reviewed record lists 4.24 seconds. Source setting: reported pro day. Read the event notes before comparing that mark with another workout.
Where the time comes from
A Chiefs article describes a reported 4.24 second pro day run. It does not certify a combine result. The reviewed sources do not establish an official 4.29 second event result or verified jumping and lifting totals.
Speed is only one part of movement
A straight sprint measures elapsed time over a fixed distance. It does not measure top speed during a game, running with the ball or the ability to change direction. A start, surface or timing method can affect a comparison between events.
Kansas City selected the West Alabama receiver in the fifth round. A reported campus time can explain a speed claim, but it should not sit in an official event ranking without the same timing method and conditions.
How to compare the record
Compare the same distance, event type and timing method. A campus report and an electronic event result may use different setups. The reviewed sources here do not provide verified split times or a complete position ranking. Converting this mark into miles per hour would hide how acceleration changes during the run.
What to check for this record
The Chiefs wording matters: it calls the campus time reported. It does not publish an official scorecard in that article. The 4.24 figure therefore remains a reported mark here, and the page does not place it in an official scouting event leaderboard.
Questions readers ask
What do the timing units mean?
Each listed sprint value is elapsed time in seconds over 40 yards. It is not a top speed reading, an agility drill time or a verified split for part of the run.
Does a blank result mean a slow run?
No. A blank means the reviewed source has no recorded time. It cannot establish a failed attempt, a slow run or the reason for a missing result.
Sources and review method
We checked the linked records for this update. Team and school reports can explain the event. Historical tables compile results and may leave fields empty. We keep that distinction visible and do not claim an affiliation with the source publishers.