Clarke is married to
Olympian artistic gymnast and sports commentator
Kathy Johnson. They have two sons, Sean, a
pole vaulter who competed for the
University of Pennsylvania and was a two-time All-American, jumping 5.50 (18'1/2"), as well as Texas A&M during grad school in 2021, and Cary from a previous marriage. They reside in
Orlando,
Florida. He has run several marathons, including a sub three-hour marathon in
Los Angeles in the late 1980s. ==References==