Amazing Race Cast Includes Twin Doctors, John Wayne's Kin, an NHL Vet and Cancer Survivors

CBS has unveiled the cast for the 22nd running of The Amazing Race.

The Racers’ ages range from 21 to 58, and among them are identical twin doctors, teamed-up descendants of Daniel Boone and John Wayne, roller derby moms, father/son cancer survivors and a pair of BFFs (Best Friend Firefighters).

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Take a look at all 11 teams and get ready for the next Race, kicking off Sunday, Feb. 17.