He is not as fast as people think. At least according to the film and highlights. He looks like a 4.5 guy on film. watch TCU vs Baylor 2018 13:20 in the 2nd QT. That is not 4.29 as reported by TCU coaches
It is a hands catcher and does have very solid hands.
He has a good stutter step at the top of his route and allows him to cause separation. Again this is the Big 12
He is 5''11 195 so I don't expect him to be very strong. But occasionally ill see him block just not that well.
Again not a speed demon according to the film I watched but can get open. Reports are that he ran under a 4.3 at his pro day.
Run after Catch
He has the ability to make defenders miss and create after the catch. He is very smooth when he catches the football and this allows him to gain yards after the catch.
Catching in Traffic
Could develop his hand strength as I have seen many times defenders are able to know the ball out of his hands.
Big Play Ability
He is a sneaky good route runner who gets open with double moves and gets open deep. He showcases a smooth transition between when he catches the football and what he does with yards after the catch.
He does not block often and should attempt to be more aggressive but again he is a 5''11 196 pound receiver.
The QB play at TCU is not great and hinders his production. Although he did have over 1000 yards as a sophomore.
I can not judge this accurately as I do not know him personally.
Does get open deep not solely on speed but more quickness and being able to fake out the defensive back with a double move or quick stutter step.
Over the Middle
He can catch over the middle but is a better playmaker than possession receiver who accels at catching over the middle.
With time and development can become a very good receiver
Bad QB play limits his ability to showcase his skillset
Can make defenders miss. His best ability is the ability to make a play with the ball in his hand. Taking a bad play and making something out of it. An example is the play against Baylor where he took a bubble screen to the house even though it was the right defensive call from the opposing team.
His game speed does not look elite according to the plays I watch. At 5''11 and 195 he does have a tough time making contested catches. He needs to improve as a route runner and open up his route tree.
I believe Jalen Reagor is going to be a better pro than he was college player and thats due in part of better QB play. He needs to develop his route running and become more consistent in that category. Also, he needs to develop his hand strength so he can make more contested catches. Has an opportunity to develop into an Emanuel Sanders or possibly even an Antonio Brown type of player he develops his route running and hand strength.