[1] Ritchie is best known for his acting role as Clint Buchanan, husband of heroine Victoria Lord (played by Erika Slezak) on the ABC soap opera, One Life to Live.

He also appeared in the TV series Batman as well as in many films, including First to Fight (1967), The St. Valentine's Day Massacre (1967), Bandolero!

Ritchie was critically injured at his California ranch on May 10, 1993, when his John Deere tractor upended, knocked him to the ground, and rolled over him.

[citation needed] Ritchie retired in December 1998, and said that he believed the character of Clint had been damaged during the 1992 Viki-Clint-Sloan Carpenter love triangle story.

His friend and costar Phil Carey, who played his father Asa Buchanan on One Life to Live, died of lung cancer six days after Ritchie's death.