This loves to glitch out, I finally got it to work using a team like the Titans that have an elite running back. With the Rams and chiefs? this didn't work at all.
(Play on rookie, 6 min qtrs, alter no sliders)
Using any player in the open field you need to
New control juke (Left and then right on the right joystick)
Spin (circle button without run pressed)
then walk in endzone
You must chain these, can't be tackled and the run button can interfere. I ended up getting this to work with QB Ryan Tannehill of all people.