Did anyone win a Championship their first year of Cup racing? ?

May be...

yes red byron http://en.wikipedia.org/wiki/Red_Byron

actually earnhardt only ran 27 of 31 races in 79
had he ran the other 4 who knows
probably would'nt made up1081 points though

earnhardt won in his 2nd year, gordon in his 3rd. and tony stewart was NOT the first rookie to win a race. earnhardt sr. and davey allison won races in their rookie years, just to name 2.

red byron in nascar's 1st season

No, unless Red Byron counts in 1949, as that was NASCAR's first year, so it was technically his first year in NASCAR. But he had raced before that.

I think Dale Earnhardt won it in his second year. I'm not quite 100% sure of that though.

Dale Earnhardt won the championship in his second full year in the Cup series in 1980. I think that is the closest anyone has gotten unless you count Red Byron when he won the championship in NASCAR's very first year in 1949.

From the top of my head no one has ever won in their rookie year Mags. I believe Tony Stewart was the first rookie to win a race and Gordo won a championship the earliest.

Like I said this was from the top of my head. I'm sure I may be incorrect on something. Gotta roll. Long night ahead.

Later.

Fire Storm is correct.

NOTE:Jimme Johnson is the only rookie in NASCAR history to ever lead the points :)

if not who won it in the least amount of time after starting in the Cup series???how to make a flying humanoid