Lack of speed?
He ran in 5 track meets in 2016 and did not run this year. As a sophomore he did rather well for 400m. Each meet he ran in he was progressively faster. He was in that speed/growth development phase and no doubt much faster now.
Demitrius Ivey (10th).... 3rd-place......400m.... 51.78 PR..... Apr 19,2016...... FHSAA 4A District 16
He also finished 5th in the FHSAA 4A Region 4 meet with a triple jump of over 43 feet that same year. All of those that were ahead of him were seniors and juniors. Many sophomores who jump 43'+ end up meeting the national HS elite standard of 45'. The triple jump shows explosion.
Triple jump was the 19th best in the state of Florida for sophomores
How much correlation is there between a good 400m time and football speed?
How much correlation is there between any track event and football speed. Who runs in a straight line from a sprinters crouch on a football field? No sense going after this guy CarolCity as he is just posting some track events as there has been no Nike on him
The one guy that says look at the film against top players has about he best correlation.
Get your rabbit ears off, bub. I asked the guy a simple question because he seems to be dialed in on track info. If that's "going after" him to you, then you're weak.
I have been an assistant track coach at ASU before I took a head coach job at a SW JUCO. We timed ball players for 40 and saw the track correlations in various sprinting races if they were track athletes. There is according to various research studies/publications in football and track and field there is a 32% to 78% correlation between the 40yd and 60m and longer races up to 400m. Naturally, the correlation is closer when shorter distances are compared to each other but a of level of significance does exist between the 200m, 300m and 400m.
There are also plenty in instances where a man can have very good to excellent 40 ,55m or 60m but lacks the developed stamina" to perform a 400 that would be considered good.
Therefore practice in any event is the key to an excellent time. NIKE combines over and over again have show players who have clocked legit 11.0 and lower 100m meter times and produced 40 times in the 4.7 range. Why do you think that in most of the regional NIKE combines many invitees 30-35% especially skilled players refuse to run the 40 even though they may be good 100m or shorter sprinters.
And the intangibles such as ability to flip hips, backpedal with speed and break, slow and stop and be able to accelerate back to top speed in the shortest time, etc, etc. are more than any straight line 40 or sprint distance in track can show on the field.
Have you had a stopwatch on Ivey in the 40? Apparently, MR and company think he has the ability and I will take their evaluation anytime.