RC on the win record.
“In 2002, Carmichael switched to Team Honda before dominating the AMA Supercross Championship, and set a record that can never be broken in AMA 250cc National Motocross racing: he won every moto he entered that season, going 24 for 24, and earning the first perfect season in U.S. motocross history. The 2003 season saw Carmichael once again win both the AMA Supercross championship as well as the AMA National Motocross championship. In his final season aboard a Factory American Honda in 2004, Carmichael matched his perfect season in the AMA Motocross National series, once again winning all 24 motos.”