Ken Greene, a 51-year-old home-builder and ex-NFL player from San Diego, and
Tina Greene, a 48-year-old president of BioPharmMed from Tampa, Fla., are a
married-but-separated couple and one of the teams competing in this race around
"The Amazing Race 13"
premieres ... moreSunday, Sept. 28, at 8 p.m. ET/PT on CBS.