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:
ud83dudd38 D2 walk-on
ud83dudd38 Undrafted in 2012
ud83dudd38 No rookie minicamp invites
ud83dudd38 Worked at a potato chip factory, UPS
ud83dudd38 Drove 3 hours to Buffalo for a CFL tryout
ud83dudd38 Played 3 seasons in the CFL from 2013-2015 pic.