Oakland Raiders stud Erik Harris -- a former D2 walk-on who BALLED OUT on Thursday -- just gave an awesome pump-up speech to everyone who's doubting themselves, saying, "Keep pushing forward!"
Harris' story is amazing ... the dude turned himself from an undrafted free agent in 2012 into the star of "Thursday Night Football" this week -- and when we asked him about the whole journey, he said it's been pretty epic.
Erik Harris has two INTs tonight including this pick six. His story is wild:
🔸 D2 walk-on 🔸 Undrafted in 2012 🔸 No rookie minicamp invites 🔸 Worked at a potato chip factory, UPS 🔸 Drove 3 hours to Buffalo for a CFL tryout 🔸 Played 3 seasons in the CFL from 2013-2015 pic.twitter.com/g1nO0P7eYY