Kenneth Edward "Ken" Greene (born May 8, 1956) is a former professional American football player who played safety for the St. Louis Cardinals (1978-1982) and the San Diego Chargers (1983-1984).

He appeared in the 13th season of The Amazing Race. His partner was his wife, Tina Greene. The goal on the race was to try to mend their broken marriage. They finished the race in 2nd place and ultimately lost the $1 Million grand prize and The Amazing Race 13 winners' title to the brother and sister team of Nick and Starr, but agreed to give their marriage another try.