Those of us who can't live without NASCAR are lucky that it has the shortest offseason of any sport—about two months, not counting winter testing in January and early February. But having a short offseason doesn't mean that a lot of things don't change from one season to the next, to which the jump from 2012 to 2013 can easily attest.
Plenty of high profile names are changing places this season, from a former champion ending a decade-plus relationship with his team to some complete overhauls at the sport's lower levels. One series announced that it would add dirt and road-course racing for 2013. And with no more top 35 rule, the return of testing, and new cars that look like their street counterparts, this year's Sprint Cup Series feels like a throwback to where the sport was 20 years ago.
So out of all of these changes, which are the most significant? Counting down from ten to one, here they are: