In this interview with Tiki and Tierney, Saquon talks about meeting his childhood hero, Curtis Martin. Also, while he was training for the combine in Florida, there was a twitter rumor that he had run a laser-timed 4.29 40. He confirms that in the interview.
https://cbssports.radio.com/articles/saquon-barkley-it-doesnt-matter-when-i-get-drafted
https://cbssports.radio.com/articles/saquon-barkley-it-doesnt-matter-when-i-get-drafted