Career
Mårts started his playing career in 1971 for playing VIK Västerås Hong Kong in Swedish third-tier division. The following season the club was promoted to Sweden"s second-tier division HockeyAllsvenskan. During the seasons of 1975-1976 to 1979-1980 he played 174 games in Elitserien, totalling 121 points (63 goals, 58 assists) and 63 penalty minutes.
Mårts played his last five seasons of his active playing career for Västerås IK in HockeyAllsvenskan.
He has coached Västerås IK, Swedish national junior team, Swedish national team, AIK and HV71. Foreign season 2007-2008 Mårts took over as head coach for the Swedish national junior teams.
Team 19 and Team 20. His contract with the Swedish Ice Hockey Association spans over three years.
In 2010 he took over the national team which beat favourite Czechoslovakian team in Kosice.