<Tr> <Th_colspan="2"> Johnny Crawford </Th> </Tr> <Tr> <Td_colspan="2"> Johnny Crawford in The Rifleman (1961) </Td> </Tr> <Tr> <Th> </Th> <Td> John Ernest Crawford (1946 - 03 - 26) March 26, 1946 (age 72) Los Angeles, California, U.S. </Td> </Tr> <Tr> <Th> Occupation </Th> <Td> Actor, singer, musician, band leader </Td> </Tr>

What happened to the actor who played mark on the rifleman