This is amazing ... ex-NFL running back Isaiah Pead hit the track in Oklahoma for his first running workout with his prosthetic leg -- AND HE KILLED IT!!
The 28-year-old lost most of his left leg in a Nov. 2016 car accident -- but he finally got a running prosthesis and on Monday afternoon, he decided to test it out.
You gotta watch the video ... Pead is nothing short of impressive.
Remember, Pead only got the new leg on Friday and could barely walk in it at first.