Ex-NFL star Arian Foster says Beto O'Rourke isn't some flash in the pan viral video star -- he's WAY more impressive than that NFL kneeling video shows ... and that's saying A LOT.
O'Rourke is running for senator in Texas against Ted Cruz -- and his popularity exploded last week after footage surfaced showing him explaining why he supports the NFL kneelers.
Foster -- who played for the Houston Texans and still lives there -- went out and met with O'Rourke last week because they had a mutual friend and he wanted to see what Beto was all about.