Troubled jockeyThe incident occurred after Tarrant got into a verbal altercation with Cassidy in the vicinity of the scales area.Tarrant then headbutted Cassidy, resulting in his helmet making contact with the nose of Cassidy, causing injury to the 49-year-old.Stewards charged Tarrant with misconduct under AR115(1)(a).After pleading guilty to the charge, the 25-year-old was hit with a six-month disqualification, with the ban to expire on October 22.In considering penalty, stewards took into account the significant contact made to Cassidy and also the breach of the COVID-19 social distancing protocols currently in place, as well as the potential for his actions to have an adverse effect on the racing industry.It continues the chequered career for the former champion apprentice, who has had periods out of the saddle due to drug indiscretions.There has been more lows than highs however in recent years for Tarrant who rose to prominence in 2015 when he partnered Le Chef to victory in the Magic Millions 2YO Classic.