What does Jimmie Johnson have yet to prove?
How about eight Sprint Cup championships?
"I want to be considered the best driver to ever sit in a stock car," Johnson said. "The undisputed way to pull that off is to win eight championships. That's what I said a few months back and I know that I put that mark way, way out there in front of me and it's a lofty goal.
"I've accomplished every goal that I've set in front of myself, I've knocked down and I'm going to put one way out there and hope I get there."
Johnson became the first NASCAR driver to win five consecutive titles, from 2006-2010. Now, with two races remaining in the 2012 season, Johnson appears to be on the cusp of celebrating his "six-pack" or sixth championship.
Although Johnson might believe eight championships is a "lofty goal," his fellow competitors know he's perfectly capable of reaching the mark. He currently holds a seven-point advantage over Brad Keselowski heading into Sunday's Kobalt Tools 500 at Phoenix Int...