Martin begins the 10-race Chase this weekend at New Hampshire in the first seed by virtue of his four victories so far this season. He is also the oldest of the 12 drivers competing in the Chase at age 50. Martin currently holds a 10-point advantage over Tony Stewart and HMS teammate Jimmie Johnson, who is seeking his record fourth consecutive Cup championship.

"That shouldn't come as any big surprise," Martin said. "Who would want to quit?"

Martin is in his first season driving for Hendrick. In May, HMS announced that Martin had agreed to forego a part-time schedule and return full-time for the 2010 season.

"Mark has been an unbelievable asset to our organization," team owner Rick Hendrick said. "I can't overstate the contribution he's made or the kind of teammate he's been, and we're excited that he'll race with us for the next two years. With his focus and dedication, he will continue to make all of us better."

GoDaddy will serve as Martin's sponsor for at least 20 races next year, starting with the season-opening Daytona 500. Additional sponsorship for the No.5 team will be announced at a later date.