Chris O'Donnell -- Back Off Jordan Spieth ... Guy's Still a Beast (VIDEO)

One meltdown doesn't make you a loser ... especially when it's Jordan Spieth.

We were talkin' about Spieth's disaster of a finish with Chris O'Donnell (he's a huge golf nut) -- when Chris essentially explained why Jordan's quadruple bogey at the 12th hole at The Masters won't define him.

Long story short ... O'Donnell says there's still one thing Spieth does better than ANYONE ELSE in the world.