But Calaway, better known by his ring name "The Undertaker," has taken it easy as of late, spending more hours relaxing with his wife, Michelle McCool, and their 8-year-old daughter, Kaia.

Following their marriage, they welcomed their daughter, Kaia Faith Calaway, in August 2012. As for the age difference, The Undertaker and Michelle McCool have a 15-year age difference. The ...

it still can be "scary," McCool — who shares an 8-year-old daughter, Kaia, with her husband — says. Check out more about the legacy of The Undertaker in this week's issue of PEOPLE.

WWE wrestlers The Undertaker and Michelle McCool have been married since 2010 despite a 15-year age difference. They have a daughter, Kaia Faith Calaway, born in 2012. Both retired from wrestling ...