Don went through surgery to treat cancer.
Disease found during annual check-up.
Matt Hagan and Erica Enders-Stevens triumph for the event and the season title.
Veteran comes up short for 17th championship.
Tony Schumacher, Andrew Hines wrap up Top Fuel and Pro Stock Motorcycle championships early.
Castrol leaves, Lucas arrives as team's sponsor.
Funny Car, Pro Stock titles to be decided in today's finals.
Shane Gray and Hector Arana Jr. also top qualifying at Pomona finale.
Funny car points battle will be decided between Force and Hagan.
Can youth overcome experience?
Loses to Spencer Massey in a close one.
Force didn't have the weekend he wanted in Las Vegas, but it could have been much worse.
Andrew Hines all but clinches bike title with one race left.
John Force raced to the qualifying lead Friday at the NHRA Toyota Nationals at The Strip at Las Vegas Motor Speedway.
Pro Stock driver had a slow start, but has made a solid comeback.
Departure of longtime crew chief with two races left could be a factor.