[1] Mottin spent the majority of his playing career with Angers, making 172 league appearances in nine seasons with the club, including 26 matches in Ligue 1 during the 1993–94 campaign.
In January 2001, he was appointed manager of the Ligue 2 club following the departure of Denis Goavec, but could not prevent the team's relegation to the Championnat National at the end of the season.
Mottin led Angers to a ninth-place finish in the third division the following season, and was subsequently replaced by Éric Guérit in the summer of 2002.
A year later, he joined Division d'Honneur Atlantique side Le Poiré-sur-Vie, and led the team to promotion to the Championnat de France amateur 2 in 2006.
After leaving Le Poiré-sur-Vie in 2007, Mottin spent three years out of management before being hired by Avranches in the summer of 2010.