Damon, Johnson celebrate titles

Johnny Damon knows how difficult it can be to win a championship. That's why even he marvels at Jimmie Johnson, who wrapped up an unprecedented fourth consecutive Cup championship.

HOMESTEAD, FL - NOVEMBER 22: Jimmie Johnson, driver of the #48 Lowe's Chevrolet, celebrates after winning the NASCAR Sprint Cup Series Championship af...

HOMESTEAD, FL - NOVEMBER 21: Kyle Busch, driver of the #18 Z-Line Designs Toyota, does a celebration lap after winning the NASCAR Nationwide Series Ch...